Retrieving Many-to-Many Relationships

Hi,
I have Entity A that link to Entity A (Link to itself) with Many-to-Many Relationships,For example: I have entity "new_role" and it's can represent a role that is stands for one role , or it's can represent a Team that team can be 2 or more roles (Many-to-Many Relationships to the same entity).
I have try to retrieve (SDK) data by using the LinkFromEntityName but it's work fine jest between 2 difference entities – when I try to run the same logic to Many-to-Many Relationships to the same entity I got the Error that the attribute in the LinkFromAttributeName properties is not exists in the linkek entity
Here is the sample from SDK:

// Set up the CRM Service.
CrmAuthenticationToken token = new CrmAuthenticationToken();
token.AuthenticationType = 0;
token.OrganizationName = "AdventureWorksCycle";

CrmService service = new CrmService();
service.Url = ""http://:/mscrmservices/2007/crmservice.asmx";
service.CrmAuthenticationTokenValue = token;
service.Credentials = System.Net.CredentialCache.DefaultCredentials;

// Get the GUID of the current user.
WhoAmIRequest who = new WhoAmIRequest();
WhoAmIResponse whoResp = (WhoAmIResponse)service.Execute(who);

Guid userid = whoResp.UserId;

// Create a query expression.
QueryExpression qe = new QueryExpression();
qe.EntityName = "role";
qe.ColumnSet = new AllColumns();

// Create the link entity from role to systemuserroles.
LinkEntity le = new LinkEntity();
le.LinkFromEntityName = "role";
le.LinkFromAttributeName = "roleid";
le.LinkToEntityName = "systemuserroles";
le.LinkToAttributeName = "roleid";

LinkEntity le2 = new LinkEntity();
le2.LinkFromEntityName = "systemuserroles";
le2.LinkFromAttributeName = "systemuserid";
le2.LinkToEntityName = "systemuser";
le2.LinkToAttributeName = "systemuserid";

// Create the condition to test the user ID.
ConditionExpression ce = new ConditionExpression();
ce.AttributeName = "systemuserid";
ce.Operator = ConditionOperator.Equal;
ce.Values = new object[]{userid};

// Add the condition to the link entity.
le2.LinkCriteria = new FilterExpression();
le2.LinkCriteria.Conditions = new ConditionExpression[]{ce};

// Add the from and to links to the query.
le.LinkEntities = new LinkEntity[]{le2};
qe.LinkEntities = new LinkEntity[]{le};

// Retrieve the roles and write each one to the console.
BusinessEntityCollection bec = service.RetrieveMultiple(qe);
foreach (BusinessEntity e in bec.BusinessEntities)
{
role r = (role)e;
Console.WriteLine(r.name.ToString());
}



Thanks
ItzikBS