Model is invisible

[green1152]

Seeing as this was the only logical section to put this plea in.. I tought i woud do it here.

Ok, I have completed a model and now I want to test it ingame. I exported the file to DFF vice city, then imported it into gta3.img. When I start up the game and go to the locaton where that model should be, it is there and I can enter it but everything is invisible except for the widescreen_hi_ok. I am making a plane and want to know what I have done wrong, so I can correct it and get it right. Please help me.