Anyone still getting 'invalid serial number' when they try to host an online game?
I've received my cd-key file attachment from GOG and placed it in the 'Spellforce' directory, merged it with my registry, but still get invalid serial.
I'm using Vista 64, and have placed a support request with GOG about this, just wondered if any one else has experienced this or found a work around?
Thanks.

Maybe you could do this magical thing called "Type it in manually" to get it to work, cause I did what you did and this worked.

Your sarcasm deserves an award... promotion to the STEAM Forums. :)
I'm not convinced (if memory serves me correctly) I had an opportunity to type any serial # in.
Anyway, for all those actually interested in the result of this issue, GOG support found a workaround for what I believe is an issue in Vista 64 registry.
They supplied a reg file that once merged removed the invalid serial (Thanks GOG!).

Excellent. And now to see if it works on my 32 bit...

i didn't have to enter a serial :s
just installed it and started playing...
hope you guys get it working cuz this game is to good to be not played