Blender 2,49 not responding to commands

It just incredible lag and freezing.I have to click numerous times on something to take action.I don’t know what other info to give you ,since when i run blender in terminal,it gives me no errors whatsoever.

OS:Fedora 15 KDE 4,6,3
System:Phenom II x4 965 3,4ghz,3gb DDR2 Ram,IGP ATI HD4200.