Attempted to use a variable or function where it is not valid.

[Thisman888]

When I try to to run Calc2keyCE.Fast.exe in the folder it says "Calculator found, but Calc2Key not running on device."

So then, I go onto my calculator, press prgm, hit CALC2KEY, and then press enter, It says, "ERROR: INVALID, Attempted to use a variable or function where it is not valid. "

What do I do? did I do something wrong? Please help!