SSIS 2008 R2 in Cluster. Error

Hi guys

I need some help from you.

Sql 2008 R2 clusteer with 2 instances (VS are Virtual Names):

VS1/InstanceA

VS2/InstanceB

The cluster works fine without issues.

Problem:

I have configured the SS Integration Services in the cluster belonging to the VS2/Instance group.

I successfully connect to SSIS (from SQL Management Studio) by using the VS2 virtual name, but when I try to open the MSDB folder I get the error: Failed to retrieve... The SQL Server instance specified.... (A log error message).

Could you help me?

Thanks