Sounds like its either out of trim or possibly the motor isn't mounted with the correct amount of right thrust.

I read your previous post and it sounds like you are very new to the hobby. I can't begin to tell you how helpfull it can be to someone starting out to have in person help problems like this can be spotted so much easier in person then via an internet forum If at all possible visit a local club and have some one check over your plane.

Barring that advice go back and recheck everything THREE times Do you have a place we you can perform some power off glide tests without damaging the model if so check the trim with glide tests if it glides without pulling to the left my best guess it that the motor need a little more right thrust. Is the wing mounted straight and centered on the fuse??

again a problem like this can be solved much quicker with in person help??? Also try ezonemag.com it is a forum like this one only all they talk about is E-flight and the GWS planes get a lot of threads/posts the CEO of GWS even particapates (sp?) from time to time.