Caching Part 2

Ok this is a different case...

Problem: All new data that is loaded is being cached. For example, if I initially loads Dataset1, it is displayed. When I clicked on Dataset2, the data loads and accumulates in my cache.

Objective: I want to prevent data from accumulating in my cache.

Prerequisites: I used IE6.0 and meta-tags and response.headers seems to have no effect.

Secondly, I wouldn't want the user to manually configure their IE settings to see the data...

Any ideas?

Thanks.

Regards,
Nassa