diff --git a/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java b/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java
index 4c14ec5..c41fd60 100644
--- a/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java
+++ b/YACOSCore/ejbModule/org/yacos/core/users/IUserManager.java
@@ -26,7 +26,7 @@ public interface IUserManager {
 	// methodes lister
 	public List<User> getUsers();
 	public List<User> getUsers(Conference conf);
-	public List<User> getUsers(Role.RoleType type);
+	public List<User> getUsers(int conf_id,Role.RoleType type);
 	/**
 	 * Create and adds a role to a user
 	 * @param login The login of the user
diff --git a/YACOSCore/ejbModule/org/yacos/core/users/User.java b/YACOSCore/ejbModule/org/yacos/core/users/User.java
index 40e8a5c..422f94f 100644
--- a/YACOSCore/ejbModule/org/yacos/core/users/User.java
+++ b/YACOSCore/ejbModule/org/yacos/core/users/User.java
@@ -7,7 +7,6 @@ import java.util.List;
 import javax.persistence.CascadeType;
 import javax.persistence.Column;
 import javax.persistence.Entity;
-import javax.persistence.FetchType;
 import javax.persistence.Id;
 import javax.persistence.OneToMany;
 
@@ -60,7 +59,7 @@ public class User implements Serializable{
 	 * Roles for this user
 	 */
 	//@OneToMany(targetEntity=Role.class,mappedBy="user",fetch=FetchType.EAGER,cascade=CascadeType.ALL)
-	@OneToMany(targetEntity=Role.class,mappedBy="user",cascade=CascadeType.ALL)
+	@OneToMany(cascade=CascadeType.ALL, targetEntity=Role.class,mappedBy="user")
 	private List<Role> roles;
 	
 	@OneToMany(targetEntity=Article.class,mappedBy="mainAuthor")
@@ -141,11 +140,20 @@ public class User implements Serializable{
 	}
 
 	//@OneToMany(targetEntity=Role.class,mappedBy="user",fetch=FetchType.EAGER)
-	@OneToMany(targetEntity=Role.class,mappedBy="user")
+	@OneToMany(cascade=CascadeType.ALL, targetEntity=Role.class,mappedBy="user")
 	public List<Role> getRoles(){
 		return roles;
 	}
 
+	/**
+	 * @param roles the roles to set
+	 */
+	//@OneToMany(targetEntity=Role.class,mappedBy="user",fetch=FetchType.EAGER)
+	@OneToMany(cascade=CascadeType.ALL, targetEntity=Role.class,mappedBy="user")
+	public void setRoles(List<Role> roles) {
+		this.roles = roles;
+	}
+	
 	/**
 	 * @return the password
 	 */
@@ -161,14 +169,7 @@ public class User implements Serializable{
 		this.login = login;
 	}
 
-	/**
-	 * @param roles the roles to set
-	 */
-	//@OneToMany(targetEntity=Role.class,mappedBy="user",fetch=FetchType.EAGER)
-	@OneToMany(targetEntity=Role.class,mappedBy="user")
-	public void setRoles(List<Role> roles) {
-		this.roles = roles;
-	}
+	
 
 	@OneToMany(targetEntity=Article.class,mappedBy="mainAuthor")
 	public List<Article> getArticles() {
diff --git a/YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java b/YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java
index 51771bd..7ab08dc 100644
--- a/YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java
+++ b/YACOSCore/ejbModule/org/yacos/core/users/UserManagerBean.java
@@ -73,12 +73,15 @@ public class UserManagerBean implements IUserManager{
 		return null;
 	}
 
-	public List<User> getUsers(RoleType type) {
-		Query query = em.createQuery("from Role role where type = ?");
+	@SuppressWarnings("unchecked")
+	public List<User> getUsers(int conf_id,RoleType type) {
+		Query query = em.createQuery("select user from User user, Role role where user.login = role.user and role.type = ? and role.conference = ?)");
 		query.setParameter(1, type); 
+		Conference conference = em.find(Conference.class, conf_id);
+		query.setParameter(2, conference);
 		return query.getResultList();
 	}
-
+	
 	public List<Role> getRoles() {
 		// TODO Auto-generated method stub
 		return null;