Caching Problem

I am sure I am making this more difficult then it really is but here is my problem.

I have a page that is being dynamically created. This page has nothing more then a Table with one row one TD. The table is nothing more then an output of a JPG.

This JPG is being created dynamically with GhostScript and is using as its name userid.jpg.

When you re run the page a new JPG is generated but it still shows the old one (hence caching issue).

Here is what I have tried...
1. <meta http-equiv=Pragma content=no-cache>
2. <cfheader name = "Expires" value = "#Now()#">
<cfheader name = "Cache-control" value = "No-cache, no-store, must-revalidate">

Both I have tried in my Head and other locations on the page. Any help would be greatly appreciated. I know I can "fix" this by just appending a random number to the filename but i dont think that should be the fix. I know there is a way to keep the browser from caching the image. Thanks again.

why don't you want to use a random #? (BTW I would append it the src attr of the image not the page, since that's what you want to avoid caching)

This is really a browser problem, and how images are cached (and how the cache is handled) are browser-specific. Using a unique image name is probably the best solution.

Yeah I already have added on a rand number and it is working. Just this site is very server intense and granted picking a rand number is not a lot but it is some.

Thanks for the responces.