Minimum stage size

I have a 300 x 35 pixel stage (You tube flash banner). When I test FlashEff2 on dynamic text at stage /document size of 40 pixels high it works, change to 35 pixels high and it doesn't work. Is there a minimum size restriction?

No, it shouldn't be any size restriction. Could you please open a ticket and send us the source file in which you encountered this problem? Thank you.