DG41WY BIOS date not saving every shutdown

Good day everyone.

I had an DG41WY mainboard with Windows 7 Ultimate 64 OS. The problem is every time it shutdown and boot up again, the BIOS system date is going back to it's manufacturing date (e.g. 2009) "custom setting" didn't save.

I'd already replaced a new CMOS batttery but unfortunately the problem still same.

Can you please help. Thank you.

God bless.

Ochie