I don't know how long ago you did this, but housecall is much better now. It's one of the top 3 online activex scans there is. It's made by trend micro and the website is;
http://housecall.trendmicro.com/It's also the only one I know of which allows anything other than IE5. Being as I use firefox, it's prefered by me.
I used it just a couple a days ago and did something stupid while it was running and had to reset everything to get it right.
If you really have problems I suggest
http://www.bleepingcomputer.com/they have sections for macs, linux and windows products. they helped me clean and disinfect my computer and bathroom floor!
there ya go. There forum is more like a chat room with topic turnaround times.