IE Cache problem:cache-control,pragma,no-cache headers are not working.

hai guys,

i am scripting in asp and using  IE7 browser.

 i have problem with IE browser cache.Mainly its giving problem with taking images.its taking them from cache not from server.

i have used...some of cache clearing mesures,like...

Response.Expires = 0
Response.AddHeader "pragma","no-cache"
Response.AddHeader "cache-control","private"
Response.CacheControl = "no-cache"

I have used them on the top of the page.and i have tried with "no-store" also..

still no use..

som times..even when i have updated javascript file (pasted updated file) in the server...and refreshed there, still the browser is taking the old script only..

this is going to be a problem for me...

please help me...

thanks in advance..

suneel.