two hard drives wont work at same time

[OpenToSuggestions]

Hi all. I am trying to use a 250gig maxtor and a 250gig samsung both IDE on the same IDE cable on my DS3.
They both work individually but not togetther. Upon start up where it says what drives you have the writing is all messed up with both pluuged in. Vista is on my sata hard drive and both the IDEs are set to slave. Why wont they work?? very anoying. please help.

Thanks

 

[OpenToSuggestions]

ahh ok i got ya. not got any spare ones at uni so gotta get rents to post em ty for the feedback