Running on Laptop:
AMD Athlon II X2 P340
AMD Radeon HD 6650M
4 GB DDR3 Memory
750 GB HDD
And mine runs fine with a command.txt, Get it here.
That, I'm using that and it works fine, maybe you want to add -windowed to the line if you want it windowed, it works sometimes, I had it at first, but then I deleted it, and it ran fine.
So try that, it helped me, works like a charm.