T61 Multi Button Use

[mrburgundy9]

For some reason my t61 will not register me hitting the space bar when both the up and left arrow keys are pressed down.  It will   work in any other combination of arrow keys but not the up and left arrow key together.  Any ideas on the problem/fixes?

Thanks in advance. 

[mrburgundy9]

Adding onto my previous post, I forgot to mention that I get a beep as well when I press all three buttons.

Thanks