I bought a new case and took the parts from one case and put them into the new one. It will boot if only my 40 gig HDD is plugged in, the on that has windows installed on it. My other, my data drive which is a seagate 300 gig, if put as slave on the same cable keeps the computer from booting. I have the same setup as before, it makes no sense that it wouldn't work now. PLEASE help i've been working on it so much and im at a deadend. Thanks in advance