IView to Workset problem

Hi,

I have created a extra iview that was added to the workset which already contains existing iviews. The workset will then link to the role. Howver, the existing iviews in the workset that link to the role which was then assigned to the user,were able to show in the navigation but the newly created iview that was just added to did not show after login to NW04 portal. Is there any changes that related to the cache as I have tried to restart one of the server process( 3 server process) running in one physcial( total got 2 physcial servers) machine and the changes reflect immediately. But the other 2 servers process still did not shown the iview. Is there any settings in portal that need to change in order for the changes done in the Iview that should be reflected to what the users' role should have?

I am running 2 with windows 64-bits portal servers with the clustered portal content directory server in the 3rd machine.

Please advise on this.

Thanks.

Lee