phpthumboff 1.3.1 in a multi context multi domain setup

Hi,

I'm running revo 2.20.pl2 and was using phpthumboff 1.3.0 which was working pretty fine. Just had a problem with the zoom crop.

However I just upgraded to the 1.3.1 and now everything is workgin perfectly in the web context and domain1.com.
But when I try to use phpthumboff in another context with domain2.com I get an error which says:
"Off server thumbnailing is not allowed"

Can anybody help.

Thanks a lot.