Mirror?

Iv'e been working on a project and I need to mirror the wing. In g-max it looks normal but when I upload it into the game. The wing shows up as all the polygons are flipped. What I did was cloned the left wing, then grouped it as rwing, mirrored it and positioned the wing as the right wing.
here's some pics


-thanks, kadet
here's some pics


-thanks, kadet