colisions problems

well i am but i wont work

While Not KeyDown(1)

MoveEntity tank1, 10,0,0



If KeyDown(32)=True Then TurnEntity camera,0,-1,0
If KeyDown(30)=True Then TurnEntity camera,0,1,0
If KeyDown(31)=True Then MoveEntity camera,0,0,-0.1
If KeyDown(17)=True Then MoveEntity camera,0,0,0.1

UpdateWorld
RenderWorld
Flip
Wend
End

:S