My password wasn't working but...
This is the first time I've posted on El Reg, it's a shame it's under these circumstances.
I'm a UK Reg customer and I finally got my letter through on Friday, but the password didn't work (I wasn't sure if it was just the rubbish captcha thing they've got going on or not) but I did manage to log in on the actual Fasthosts website with it. So that might be worth a try if you're not getting through.
A couple of pence from me to you.