TerraHax Problem

When ever i move i fall through bricks and i cant move "right" (D) for some odd reason my friend uses it just fine but me i have problems. is there any solution so this?

This is a problem with your .NET I'm guessing you are using windows 8 wich use .NET 4.5. The client was made for 4.0 and the creator of Terrahax is fixing this as we speak probably. Dont worry

im running a Windows 8 OS . i have .net 4.0 im sure. hopefully he will get it updated soon. so what .net do you prefer? or how do i downgrade from 4.5 to 4.0 if i have 4.5

I have no idea how to downgrade it. Also 4.5 is installed on windows 8 automaticly in the beginning. So unless you downgraded then you have 4.5.