Ecs A780GM-A v1.1 Overclock problem

I asked ECS Technical Support Dept.

"Hi, How do overclock AMD Athlon II X4 640 3.000 processor on bios or with AMD Overdrive? I want to overclock in bios only frequency (for example 3.000 Mhz to 3.500 Mhz) but I couldn't.
And there is no change amd overdrive happens. Everything is fixed. I can not change. Please help..   "

They Answer:

"Thanks for contacting ECS!
Please enter CMOS setup menu to enable “CPU Over-clocking Function”, then OC CPU frequency, and then save & exit CMOS to check it under Windows. Thanks!"

But I did it before and didn't work. After that ı asked again:

However, the current frequency can be set only for that Athlon II X4 . But the part of the BIOS to OC frequency "Enable" is not an increase in the frequency value even if I have for example 220​​. AMD overdrive frequency, a change in the opening, but I can not. Bios and AMD Overdrive screens below. Thank you ..

http://img515.imageshack.us/img515/2156/bioseng.jpg
http://img254.imageshack.us/img254/7262/amdoverdrive1en...
http://img40.imageshack.us/img40/2245/amdoverdrive2eng....


And I'm waiting their answer, maybe it'll help you before. Thanks. And my system:

AMD Athlon II X4 640 3.0 GHz/2x2=4 GB Corsair Value Select DDR2-800/2x2=4 GB Corsair XMS2 CM2X2048-6400C5 DDR2-800 / ECS A780GM-A B.E. V1.1 / Palit HD4850 512 MB /320 GB Samsung Sata II HDD / 1 TB Samsung Sata II HDD / Xilence XP700 700W 135mm Fan PSU Gaming Serisi 80+ R3 / Microsoft Windows 7 Ultimate SP1 64 Bit.