sgtviper

So I have a really random question...How do I get the NASA LER from the American Pack off Kerbin and it still be usable? Every thing I have tried lately has failed, the failure being that the wheels phase through anything I try to use and then the LER becomes undrivable. Any tips, or suggestions or even telling me I'm an idiot then telling me how it is meant to work would be awesome, because I can't figure it out.