Freezing at POST, can't access BIOS; New build

[frostbitphoenix]

I have just completed building a new PC, but when I got it up and going, it would not go past the POST screen. It stops after the "memory testing:" line. It says that I can push to enter the BIOS, but that does nothing. I know the keyboard is fine, so I am guessing this is a simple hardware malfunction. I have not been able to get past this to even install Windows yet.

My hardware is:
MOTHERBOARD: Foxconn 755A01-6EKRS
CPU: Athlon sempron 3300+
RAM: VData 512MB DDR400
HD: Western Digital 60GB 7200RPM

This happens regardless of if the HD is connected or not, so I am assuming it is bad memory (I have tried putting the one stick in all three slots). If anybody has any ideas, I would really appreciate them. I might have left out some information, so let me know if there's something else you might need to know to help me. Thank you in advance.

[flanzig1]

May need to clear the BIOS by pulling the battery for a few seconds and then reinstall. Also, make sure the jumpers on the mobo are set correctly for the CPU. (if it uses jumpers).