diff --git a/YACOSWeb/WebContent/WEB-INF/applicationContextAcegi.xml b/YACOSWeb/WebContent/WEB-INF/applicationContextAcegi.xml
index 569b1c0..32b44ad 100644
--- a/YACOSWeb/WebContent/WEB-INF/applicationContextAcegi.xml
+++ b/YACOSWeb/WebContent/WEB-INF/applicationContextAcegi.xml
@@ -96,7 +96,7 @@ http://www.springframework.org/schema/beans http://www.springframework.org/schem
     <value>
       CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON
       PATTERN_TYPE_APACHE_ANT
-      /secure/**=ROLE_ADMIN,ROLE_AUTHOR,ROLE_MEMBER
+      /secure/**=ROLE_ADMIN,ROLE_AUTHOR,ROLE_PCMEMBER
       /secure/**=IS_AUTHENTICATED_REMEMBERED
       /**=IS_AUTHENTICATED_ANONYMOUSLY
     </value>
diff --git a/YACOSWeb/WebContent/WEB-INF/classes/messages.properties b/YACOSWeb/WebContent/WEB-INF/classes/messages.properties
index 8c11f38..2e248b9 100644
--- a/YACOSWeb/WebContent/WEB-INF/classes/messages.properties
+++ b/YACOSWeb/WebContent/WEB-INF/classes/messages.properties
@@ -18,6 +18,10 @@ menu.pcmember.title=PC Member
 menu.referee.title=Referee
 menu.author.title=Author
 menu.anonymous.title=Menu
+CHAIRMAN=Chairman
+PCMEMBER=PC Member
+REFEREE=Referee
+AUTHOR=Author
 
 ###################
 # REGISTRATION USER
diff --git a/YACOSWeb/WebContent/WEB-INF/decorators/usermenu.jsp b/YACOSWeb/WebContent/WEB-INF/decorators/usermenu.jsp
index 367518b..0d97a22 100644
--- a/YACOSWeb/WebContent/WEB-INF/decorators/usermenu.jsp
+++ b/YACOSWeb/WebContent/WEB-INF/decorators/usermenu.jsp
@@ -21,7 +21,7 @@
 			</ul>
 	</div>
 	
-	<!-- AUTHOR MENU : ROLE_CHAIRMAN -->
+	<!-- AUTHOR MENU : CHAIRMAN -->
 	<authz:authorize ifAllGranted="ROLE_CHAIRMAN">
 		<div id="mainmenubloc">
 			<h4><fmt:message key="menu.chairman.title" /></h4>
diff --git a/YACOSWeb/WebContent/WEB-INF/jsp/secure/userinformation.jsp b/YACOSWeb/WebContent/WEB-INF/jsp/secure/userinformation.jsp
index cf18096..7017a4c 100644
--- a/YACOSWeb/WebContent/WEB-INF/jsp/secure/userinformation.jsp
+++ b/YACOSWeb/WebContent/WEB-INF/jsp/secure/userinformation.jsp
@@ -5,7 +5,7 @@
 <head></head>
 <body>
 
-	Firstname Lastname <b>(<authz:authentication operation="username"></authz:authentication>)</b><br />
+	${ currentUser.firstName } ${ currentUser.lastName } <b>(<authz:authentication operation="username"></authz:authentication>)</b><br />
 	You currently follow <b>4</b> conferences<br />
 	You have the following rights : <b>Author, Chairman, PC Member</b><br />
 	<a href="#">Change my profile</a><br />
diff --git a/YACOSWeb/WebContent/WEB-INF/users.properties b/YACOSWeb/WebContent/WEB-INF/users.properties
deleted file mode 100644
index cfe19b6..0000000
--- a/YACOSWeb/WebContent/WEB-INF/users.properties
+++ /dev/null
@@ -1,3 +0,0 @@
-maxime=maxime,ROLE_AUTHOR,ROLE_PCMEMBER,ROLE_CHAIRMAN,ROLE_REFEREE
-fred=fred,ROLE_MEMBER
-jialin=jialin,ROLE_ADMIN
\ No newline at end of file
diff --git a/YACOSWeb/src/org/yacos/auth/UserDetails.java b/YACOSWeb/src/org/yacos/auth/UserDetails.java
index 103f708..babbf74 100644
--- a/YACOSWeb/src/org/yacos/auth/UserDetails.java
+++ b/YACOSWeb/src/org/yacos/auth/UserDetails.java
@@ -1,6 +1,5 @@
 package org.yacos.auth;
 
-import java.util.ArrayList;
 import java.util.List;
 import org.acegisecurity.GrantedAuthority;
 import org.acegisecurity.GrantedAuthorityImpl;
@@ -57,7 +56,7 @@ public class UserDetails implements org.acegisecurity.userdetails.UserDetails {
 			}
 			
 			for(int i=0;i<rolesList.size();i++){
-				authorities[i] = new GrantedAuthorityImpl(rolesList.get(i).getType().name());
+				authorities[i] = new GrantedAuthorityImpl("ROLE_"+rolesList.get(i).getType().name());
 			}
 		}
 		
diff --git a/YACOSWeb/src/org/yacos/web/system/session/SessionService.java b/YACOSWeb/src/org/yacos/web/system/session/SessionService.java
index 3ab801f..c486eaa 100644
--- a/YACOSWeb/src/org/yacos/web/system/session/SessionService.java
+++ b/YACOSWeb/src/org/yacos/web/system/session/SessionService.java
@@ -5,7 +5,11 @@ import javax.naming.InitialContext;
 import javax.naming.NamingException;
 import javax.servlet.ServletContext;
 import javax.servlet.http.HttpServletRequest;
+import org.acegisecurity.Authentication;
+import org.acegisecurity.context.SecurityContextHolder;
+import org.acegisecurity.providers.dao.DaoAuthenticationProvider;
 import org.springframework.web.util.WebUtils;
+import org.yacos.auth.UserDetailsService;
 import org.yacos.core.conferences.Conference;
 import org.yacos.core.conferences.IConferenceManager;
 import org.yacos.core.users.IUserManager;
@@ -101,6 +105,11 @@ public class SessionService {
 		WebUtils.setSessionAttribute(request, "currentConferenceId", currentConferenceId);
 		currentConference = conferenceManager.getConference(currentConferenceId);
 		request.setAttribute("currentConference", currentConference);
+		// Refreshing user credentials
+		Authentication currentAuthentication = SecurityContextHolder.getContext().getAuthentication();
+		DaoAuthenticationProvider authProvider = new DaoAuthenticationProvider();
+		authProvider.setUserDetailsService(new UserDetailsService());
+		SecurityContextHolder.getContext().setAuthentication(authProvider.authenticate(currentAuthentication));
 	}
 	
 	/**
@@ -137,6 +146,7 @@ public class SessionService {
 	 * @param request The current HTTP request object, necessary for session operations
 	 * @param currentUser The new current user to set
 	 */
+	@Deprecated
 	public void setCurrentUser(User currentUser) {
 		this.currentUser = currentUser;
 		this.setCurrentUserLogin(currentUser.getLogin());
@@ -147,6 +157,7 @@ public class SessionService {
 	 * @param request The current HTTP request object, necessary for session operations
 	 * @param login The new current user login
 	 */
+	@Deprecated
 	public void setCurrentUserLogin(String login) {
 		WebUtils.setSessionAttribute(request, "currentUserLogin", login);
 		currentUser = userManager.getUser(login);
@@ -161,9 +172,8 @@ public class SessionService {
 	 * @return The current user login
 	 */
 	public String getCurrentUserLogin(){
-		// Retrieve the login from the session
-		String login = (String) WebUtils.getSessionAttribute(request, "currentUserLogin");
-		return login;
+		// Retrieve the login from the acegi security session
+		return SecurityContextHolder.getContext().getAuthentication().getName();
 	}
 	
 	/**
@@ -180,7 +190,7 @@ public class SessionService {
 		}
 		
 		// Check if the user object is already in cache
-		if(currentUser == null || (this.getCurrentUser().getLogin().equals(login)) ){
+		if(currentUser == null || (currentUser.getLogin().equals(login)) ){
 			// Checks login for validity
 			if(login == null || login.equals("")){
 				currentUser = null;
