Caching issue - How ro remove cache from the portal iview

Hi,

I am facing problem of caching.In my application I am substituting one user(user 1) to some other user(user 2).Based on the substitution(latest substitute user 2),I should get the values for the User 2.

But after substitution,I am getting the values for the user 1 and after some time(2/3 second) I am able to get all the values for the User 2.The application is working fine.But some how its retaing the previous values of the user 1.

Can anyone please suggest me how to remove the cache from the iview.

Regards

-Sandip