invisible textures when ingame!! buaahh!!

[CAT_SHIT_ONE_MM]

Hi well the problem is that when I apply the texture in visitors and see it in visitors... it's alright.  When I export it and try it ingame there's the problem

In the Mission editor, the newly textured area has the water texture on it (I don't know why) and when I look at it in the actual game, the place textured is invisible and I could see inside the terrain... I'm really getting a headacke from this SOB... please help thanks.  I just started getting this problem yesterday... gaarrsh