Parameter Error - Whats wrong

[fly-line]

Hi

Activated the 2checkout module a couple of weeks ago and it seemed to work fine but now when I test it I get "Parameter Error" when i try to pay through 2checkout... Is this caused by my script or something at 2checkout. I chould mention that my account at 2checkout is blocked since my site is not up and running yet, can this cause the problem?

Anyone?