Render to texture in 3ds Max ?

So I rendered out a texture on the diffuse channel and edited it in Photoshop, re-applied through the map tool and it looked fine when rendered. However, when I FBX exported it, max says that it cannot export the texture ?

Any ideas (or tutorials please)

Thanks

Dont worry bout it , just apply the texture , it shoud be fine. FBX always says it cant export textures. especialy things like normal maps etc.