Asus m5a78l-m-lx3 Cpu not supported.

Hello everyone! Recently, I bought a processor and a motherboard and gave me the next error.

  52550220_991683044364620_4080647199568953344_n.jpg (Size: 85.72 KB / Downloads: 1)
Motherboard model: Asus m5a78l-m-lx3
Processor model: Phenom II x4 945 3.00 GHz

If I press F2, it starts and works perfectly but I do not know how to deal with that error. I did update to bios but the same.