Memtest86 v1.7 is reporting over 300 errors

Hello,
I'm runiing 2GB Crucial Ballistix Tracer PC2-8500 @533Mhz, 5-5-5-15-2T, 2.2v.
When I boot into memtest86 v1.7, it reports about 300 errrors within 15 minutes. I ran it 4 times and I get the same results every time.

I also ran the memory at 400Mhz, 4-4-4-12-2T, 2.2v and I go the same errors. Most of teh errors were reported after test #6 had completed.

I ran Prime95 from windows and everthing passed. No errors detected.

How should I proceed? Send the mem back or continue testing? Which program should I believe? This new Asus P5E MB and resulting memory issues is driving me crazy. It's one problem after another. I'm a newbie with this stuff so any help is much appreciated.