have you tried commenting the script out, just to make sure that definately is the only problem? (I'm pretty sure it is, but it's always better to be positive)
also, have you tried opening a ticket with their help desk? odds are they've seen it all before and can spot your problem in 2 shakes of a lamb's tail.
I've tried https without the www and that doesnt work either. I dont think the address is secure so I cant make it so.