diff --git a/YACOSCore/ejbModule/org/yacos/core/conferences/ConferenceManagerBean.java b/YACOSCore/ejbModule/org/yacos/core/conferences/ConferenceManagerBean.java
index 7dbcbd6..0515598 100644
--- a/YACOSCore/ejbModule/org/yacos/core/conferences/ConferenceManagerBean.java
+++ b/YACOSCore/ejbModule/org/yacos/core/conferences/ConferenceManagerBean.java
@@ -46,7 +46,7 @@ public class ConferenceManagerBean implements IConferenceManager {
 	public List<Conference> getConferences(User user){
 		List<Conference> list = new ArrayList<Conference>();
 		List<Role> tmpList = new UserManagerBean().getRoles();
-		System.out.println("allo????????????????????");
+		
 		Conference conf;
 		for (Role role : tmpList) {
 			conf = role.getConference();
@@ -76,11 +76,17 @@ public class ConferenceManagerBean implements IConferenceManager {
 		em.merge(role);
 	}
 	
+	public List<Role> getRoles(){
+		return em.createQuery("from Role role").getResultList();
+		
+	}
+	
 	@SuppressWarnings("unchecked")
 	public List<Role> getRoles(User user, Conference conf) {
 		 Query query = em.createQuery("from Role role where conference = ? and user = ?");
-		 query.setParameter(0, conf);
-		 query.setParameter(1, user);
+		 query.setParameter(1, conf);
+		 query.setParameter(2, user);
+		 		
 		return query.getResultList();
 	}
 	
diff --git a/YACOSCore/ejbModule/org/yacos/core/conferences/IConferenceManager.java b/YACOSCore/ejbModule/org/yacos/core/conferences/IConferenceManager.java
index 8ff10b8..54fb03c 100644
--- a/YACOSCore/ejbModule/org/yacos/core/conferences/IConferenceManager.java
+++ b/YACOSCore/ejbModule/org/yacos/core/conferences/IConferenceManager.java
@@ -29,9 +29,10 @@ public interface IConferenceManager {
 	public List<Conference> getConferences(User user);
 	
 		
-	//role methode
+	//role et user methode
 	public void addRole(Role.RoleType roleType, User user, Conference conf);
 	public void removeRole(Role role);
+	public List<Role> getRoles();
 	public List<Role> getRoles(User user, Conference conf);
 	public void updateRole(Role role);
 }