Getting Error message while trying to access security editior for a IDT universe

Hi,

I have created universe in SAP BO4.1, using IDT.

I have applied row level security for User Groups using Security Editor.

I have published the changes to repository.

But when I am trying to re open the security editor for that universe its throwing error:

"Unable to load security for universe ID ATF10O... (IDT 022123)."

I am not able to edit row level security, even this security restriction is not restricting data in WebI report.

Thanks for your response.