Here's a couple of tests you could try to help us narrow down the problem:
- See if "http://your.website.dir/BuddyTracker/ImageFactory.aspx
" is alive.
- If you're running Firefox with FireBug, write "Franson.Util.getServerName()" in the FB console (when running BuddyTracker). The output should be the same as "your.website.dir".
If the above isn't true you need to investigate your IIS mappings to see if they point correctly to your new install path.