run it outside of the case first, see if it runs fine before installing it. This will determine if its grounding/shorting out to the case (metal screws on mbd). You can get plastic sleves to prevent this usually, sometimes though it just wont work in the case.
If you argue with an idiot he will drag you down to his level and beat you with experience.
I am not a fast writer.
I am not a slow writer.
I am a half-fast writer.