Unvalid web add

I signed up, received email, clicked on link, also tried copy/paste everytime received following mess.
We could not activate your account because this web address is not valid. Make sure that you have the entire address from the email, and that your email client has not split the address over several lines.
any idea?

Try this: (copy and paste)
http://www.techspot.com/vb/register.php?a=act&u=211384

i tried copying and pasting, still receiving same message. any other ideas?