OEM version Win 2000 load problems

Okay, here’s the problemo, I built my machine, and wanted to try Win ME. Did that, didn’t like it, so formated the disc, then purchased Win 2000 and it won’t load. Gets to the product ID page, and says that the product ID is invalid.

So, what has microsoft done? How do I strip whatever Micorsoft residue is left from win ME to load Win 2000.

Please give me some steps, my dos is limited. I’ve Fdisked the disk to death, and formated it.

Machine is a 750mhz, with 256K ram….30 gig drive….

Thanks in advance