Help! CPU won't fit

I have an ASUS M4A79T mobo and the CPU I want to put in is an AMD Athlon 64 x2

When I put it onto the socket, three corners seem to fit fine, but one doesn't...

I have the lever up, and I matched up the triangles on the mobo socket and CPU

Please help!

The two parts are incompatible. The M4A79T is Socket AM3 and has 938 pins. No Athlon 64 X2 will fit in that socket as they are Socket AM2 (940 pins) or Socket 939 (939 pins). Even if you jammed it in there, Socket AM3 uses DDR3 and the DDR or DDR2-only Athlon 64 X2s would not work.

You will need to get a Socket AM3 Phenom II (any Phenom II except the 920 and 940) or Athlon II for that motherboard. Or, you need to get a Socket AM2/AM2+ or Socket 939 motherboard and some different RAM if you want to use the Athlon 64 X2.

UPDATE:

Okay, so I've decided to get a new CPU because otherwise it would be a downgrade of my mobo and ram (or so I believe?)

I don't want to make another mistake, so if anyone could confirm that this seems okay?

This is what I plan on getting:

AMD Phenom II X2 Dual Core 550 3.10GHz Black Edition (Socket AM3)

and that's to go with my:
ddr3 ram
ASUS M4A79T mobo
ATI Radeon™ HD 4830 graphics card
Samsung SpinPoint F1 320GB SATA-II 16MB Cache

Feedback would be greatly appreciated!

Ok, thank you!