You are going to have to find a Phenom II 940 for that motherboard. It's an AM2+ Cpu, and will work. Same essential architecture as the 945, but different socket and without ddr3 support. Overclocks well though, I had one for 4+ years and loved it. Still a very valid, budget gaming Cpu too.
:edit: Wow, nevermind. Supports the AM3 Phenom II 945.