Thanks for all the input.....I've been away, sorry for not replying sooner.
Okay, here we go. The bios setting is set to 200Mhz for both the chip and the memory.
I have replaced the memory with two brand new modules that are DDR400 (2 x 512 - PC3200).
The CPU is listed as a 400 FSB on the invoice and utility programs I have downloaded and checked it with also show it as 400 FSB, including the one from AMD.
And my board is a 400Mhz board.
Again thank you, I'm about to pull my hair out over this thing!