can't open iframe-window in jquery thickbox

I'm trying to open a iframe thickbox window with the following URL:

< a id="thickbox2" title="Contact us" href="/send.php?keepThis=true&#38;TB_iframe=true&#38;height=370&#38;width=300" class="blue_link">Contact us < / a >

The thickbox black background loads and the progress bar is shown, but not the send.php file.


Solution 1:

I figured it out myself; I had a "home made" and unknown bug in my thickbox.js file. When I replaced it with a new one, everything worked out great.