Perfect fighter/nexus lagg?

I start up the nexus client and then get all the way to the gui. As soon as click start the client starts lagging and freezes up. The screen will turn black and I csnt see whats happening. My bot will log me out and it just wont work -.-

i tried different ram and it is on safe mode. just can't get it to work :s Any help?

 

Hold S while Runescape loads. i had the same problem.
Let me know if this works..

Is the screen flickering?

 

Nope tried that Laggs really bad and when I click on like show npc or stats it takes ten seconds to respond and the screen will go black