Publishing hosting plans

[Milligan]

I found the link, I think, and I'm displaying it on my site using thickbox. However, I'm experiencing some problems:

http://url/orderpanel/index.php?user_id=2 is the url opened by thickbox .. and I get "Permission Denied". Is this caused by the additional values required by thickbox in the url? (In reality, the url is: http://url/orderpanel/index.php?user_id=2?keepThis=true&TB_iframe=true&height=600&width=800), or is there some other problem?

If I visit the url directly, http://url/orderpanel/index.php?user_id=2, it works .. and will also work in thickbox if I try it again.

Ideas?