Installation ASUS Mboard k7vrm Athlon800

I’m trying to install MB Asus K7V-RM with a 800mhz Athlon. The system Freeze at POST, when it startup freeze. Its Jumperfree mode (i try any mode) Message Improper external speed setting. Processor is not overclocked, DRAM conforms MB specs. It’s there any jumper or bios config, that i missed (I read all the manual & follow all instructions) The first time it worked correct, it was on for over 6 hr and didn’t hang, when I shut down and try start it didn’t do nothing…?