I have a Dell Dimension 2350 running XP SP3. I bought it used. It only had a Western Digital 400 (40GB) IDE drive, so i decided to upgrade. I purchased a Western Digital 2500 (250GB) IDE drive. When i opened my case, i saw that the ribbon only had one plug on it (i.e. it did not have the Master and Slave plugs) so, i purchased a new IDE ribbon. I put the existing hard drive on the Master plug, and the new hard drive on the Slave plug. I have also checked the jumper positions on the drives according to Wester Digital's website. when starting up the computer does not recognize either hard drive (BIOS says something like "No bootup drives were found please insert boot disc and press F1 or press F2 to enter setup") when i go into BIOS, i have everything for the IDE drives set to AUTO. Bios does not seem to be detecting the hard drives. I am lost at this point. if anybody can help me out it would be greatly appreciated.