diff --git a/YACOSWeb/WebContent/WEB-INF/classes/messages.properties b/YACOSWeb/WebContent/WEB-INF/classes/messages.properties
index 08b4ce0..bbb1c32 100644
--- a/YACOSWeb/WebContent/WEB-INF/classes/messages.properties
+++ b/YACOSWeb/WebContent/WEB-INF/classes/messages.properties
@@ -181,6 +181,9 @@ button.browse=Browse
 button.reset=Reset
 button.OK=OK
 
+###################
+# WARNING MESSAGE
+warning.articleList.empty=Sorry, but there are no articles for this conference yet.
 
 listarticle.title=Article's list
 manageArticle.title=Manage your article
@@ -191,7 +194,7 @@ preference.like=Like
 preference.indifferent=Indifferent
 preference.dislike=Dislike
 preference.ok=You have successfully chosen all your preferences about each article
-evaluation.help=Choose the preference you have for each article.
+preference.help=Choose the preference you have for each article.
 dispatch.title=Dispatch the articles to the members
 
 # Conference Form
diff --git a/YACOSWeb/WebContent/WEB-INF/jsp/choosePreference.jsp b/YACOSWeb/WebContent/WEB-INF/jsp/choosePreference.jsp
index 3ad584a..1da1266 100644
--- a/YACOSWeb/WebContent/WEB-INF/jsp/choosePreference.jsp
+++ b/YACOSWeb/WebContent/WEB-INF/jsp/choosePreference.jsp
@@ -7,33 +7,52 @@
 
 
 <h4 class="title"><fmt:message key="preference.title" /></h4>
+
+
+<c:if test="${empty articleList }">
+    <div class="warningBox">
+    	<fmt:message key="warning.articleList.empty" />
+    	<a href="<c:url value="listConference.htm"/>"><fmt:message key="home.link.choose" /></a>
+    </div>
+</c:if>
 
-<p class="formHelp">
-  <fmt:message key="preference.help"/>
-
-</p>
-
-<form:form method="post" commandName="choosePreference">
-<c:if test="${not empty articleList}">
-	<table>
+<c:if test="${not empty articleList}">
+	<p class="formHelp">
+  		<fmt:message key="preference.help"/>
+	</p>
+	<form:form method="post" commandName="choosePreference">
+	<table width="100%">
+		<tr>
+			<td width="40%">&nbsp;</td>
+			<td width="20%" align="center"><img src="./images/smiley_dislike.png" alt="dislike "title="<fmt:message key="preference.dislike"/>"/></td>
+			<td width="20%" align="center"><img src="./images/smiley_indifferent.png" alt="indifferent "title="<fmt:message key="preference.indifferent"/>"/></td>
+			<td width="20%" align="center"><img src="./images/smiley_like.png" alt="like "title="<fmt:message key="preference.like"/>"/></td>
+		</tr>
+		<tr><td colspan="4" height="2"></td></tr>
     <c:forEach items="${articleList}" var="article" varStatus="i">
-    
     <tr>
-        <td><a href="<c:url value='detailArticle.htm?id=${article.id}'/>">${article.title}</a></td>
+        <td>
+        	<a href="<c:url value='detailArticle.htm?id=${article.id}'/>">${article.title}</a>
+        </td>
         <form:hidden path="preferences[${i.index}].article.id" />
         <form:hidden path="preferences[${i.index}].pcMember.login" />
-	    <td><fmt:message key="preference.like"/></td>
-	    <td><form:radiobutton path="preferences[${i.index}].preferenceType" value="LIKE"/></td>
-	    <td><fmt:message key="preference.indifferent"/></td>
-	    <td><form:radiobutton path="preferences[${i.index}].preferenceType" value="INDIFFERENT"/></td>
-	    <td><fmt:message key="preference.dislike"/></td>
-	    <td><form:radiobutton path="preferences[${i.index}].preferenceType" value="DISLIKE"/></td> 
-     </tr>
+	    <td  align="center">
+	    	<form:radiobutton path="preferences[${i.index}].preferenceType" value="DISLIKE"/>
+	    </td>
+	    <td  align="center">
+	    	<form:radiobutton path="preferences[${i.index}].preferenceType" value="INDIFFERENT"/>
+	    </td>
+	    <td  align="center">
+	    	<form:radiobutton path="preferences[${i.index}].preferenceType" value="LIKE"/>
+	    </td> 
+   </tr>
    </c:forEach>
    </table>
-   <input type="submit" name="submit" value="<fmt:message key="button.OK"/>"/>
+   <br />
+   <center><input type="submit" name="submit" value="<fmt:message key="button.OK"/>"/></center>
+   </form:form>
 </c:if>
-</form:form>
+
 
 <c:if test="${param['message'] eq 'done'}">
 <p class="formOk">
@@ -41,10 +60,6 @@
 	You can modify your choices immediately or later.<br/>
 </p>
 </c:if>
-
-<br />
-<a href="<c:url value="main.htm"/>">Home</a>
-
 
   </body>
 </html>
diff --git a/YACOSWeb/WebContent/WEB-INF/jsp/denied.jsp b/YACOSWeb/WebContent/WEB-INF/jsp/denied.jsp
index dcfe4e4..0049c9d 100644
--- a/YACOSWeb/WebContent/WEB-INF/jsp/denied.jsp
+++ b/YACOSWeb/WebContent/WEB-INF/jsp/denied.jsp
@@ -1,16 +1,37 @@
-<%@ include file="/WEB-INF/decorators/include.jsp"%>
-
 <html>
 <head>
+	
+	<style type="text/css">
+	h1 a{
+		color: #FF4747;
+		text-decoration: none;
+	}
+	
+	h1 a:hover{
+		color: #FF0000;
+		
+	}
+	
+	
+	</style>
+	
+	
 </head>
+
 <body>
 
+<center>
+	<br/><br/><br/>
+		<h1><a href="main.htm">
+	<img src="./images/403error.jpg" alt="403" /><br/>
+	
 
-<h4 class="title">Access denied</h4>
-
-<div class="errorBox">
-	${message}
-</div>
-
+	
+	403 Error - Access Denied
+		
+	</a></h1>
+	
+</center>	
+	
 </body>
 </html>
\ No newline at end of file
diff --git a/YACOSWeb/WebContent/WEB-INF/jsp/errors/404error.jsp b/YACOSWeb/WebContent/WEB-INF/jsp/errors/404error.jsp
index ff08ac5..6af924b 100644
--- a/YACOSWeb/WebContent/WEB-INF/jsp/errors/404error.jsp
+++ b/YACOSWeb/WebContent/WEB-INF/jsp/errors/404error.jsp
@@ -22,9 +22,12 @@
 
 <center>
 	<br/><br/><br/>
+		<h1>
+	<a href="main.htm">
+
 	<img src="./images/404.jpg" alt="404" /><br/>
 	
-<h1>	<a href="main.htm">
+	
 	
 	404 Error - Page not found
 		
diff --git a/YACOSWeb/WebContent/WEB-INF/jsp/submissionArticle.jsp b/YACOSWeb/WebContent/WEB-INF/jsp/submissionArticle.jsp
index 3edf0b3..cdd27e5 100644
--- a/YACOSWeb/WebContent/WEB-INF/jsp/submissionArticle.jsp
+++ b/YACOSWeb/WebContent/WEB-INF/jsp/submissionArticle.jsp
@@ -35,6 +35,7 @@
 <p class="legend"><fmt:message key="form.article.information" /></p>
 
 <fieldset>
+	<span class="info"><fmt:message key="form.field.necessary" /></span>
 	<div>
 		<form:label path="title"><fmt:message key="form.submission.article.title" /></form:label>
 		<form:input path="title"/>*
diff --git a/YACOSWeb/WebContent/images/403error.jpg b/YACOSWeb/WebContent/images/403error.jpg
new file mode 100644
index 0000000..3b93980
Binary files /dev/null and b/YACOSWeb/WebContent/images/403error.jpg differ
diff --git a/YACOSWeb/WebContent/images/smiley_dislike.png b/YACOSWeb/WebContent/images/smiley_dislike.png
new file mode 100644
index 0000000..d404616
Binary files /dev/null and b/YACOSWeb/WebContent/images/smiley_dislike.png differ
diff --git a/YACOSWeb/WebContent/images/smiley_indifferent.png b/YACOSWeb/WebContent/images/smiley_indifferent.png
new file mode 100644
index 0000000..87f2fb9
Binary files /dev/null and b/YACOSWeb/WebContent/images/smiley_indifferent.png differ
diff --git a/YACOSWeb/WebContent/images/smiley_like.png b/YACOSWeb/WebContent/images/smiley_like.png
new file mode 100644
index 0000000..f65b7d9
Binary files /dev/null and b/YACOSWeb/WebContent/images/smiley_like.png differ