I used to have this problem, but since the program updated the other day, it seems to record in map viewer just fine, sooo to be honest I think Faren might be on to something. Other than that I ahven't got a clue myself :/

I've also had this problem :O

Everything looks ready to record but for some reason its just doesnt wanna start recording it :S

Wegame really does help make machinima easy for new comers and also for pro's. I've only just started making my machinima and through Wegame too and I have to be honest I wouldn't release my movies through anyone else!