The new sticks are incompatible with this board. Ask for another make of ram. It is possible you didn't get it plugged in all the way but take care not to apply too much pressure.
I am running 32bit Windows 7 Professional on a WinFast 6150M2MA motherboard with a AMD Athlon 64 x2 Dual Core Processor 5000+.
My motherboard has 4 slots for ram and I currently have 2 x 1GB DDR2 PC2-5300 ram modules installed and purchased another 2 x 1GB DDR2 PC2-5300 ram modules. I disconnected the power, opened the case, installed the new ram sticks and closed up. When i boot up i just hear the system produicing long beeps and the monitor stays blank.
I have tested the 4 stick together,
1 new each
and the system only works when the 2 old sticks or ram are in on their own.
Any help would be greatful.