Hard drive recognized but not accessible

Hello,
I currently have a Dell Dimension running Windows XP pro SP3. I have three old IDE hard rives (brands vary) that were used running Windows 98 SE. I'd like to access these drives to copy some old files. I purchased an External IDE enclosure and tried to access them. The drives are recognized in Device manager, but NOT in Disk management. So I have no way of accessing the data on them. Partitioning would obviously be irrelevant. Is there any way I can rectify this situation WITHOUT buying an old computer running Win98? Any help would be greatly appreciated!! Thanks!