Hi Craig
It's usually something to do with:
1) Firewall
2) Javascript settings
3) Popup blockers etc
Try some of the stuff in this thread:
http://www.iceinspace.com.au/forum/s...ad.php?t=16484
There have been no changes on IIS so it's definitely something to do with your computer/laptop.
You could try on another computer, or a public computer with your login, to verify.