Reading back up data from other PC s

I have WD2500 ME drive that i used to back up data from 2 old PCs using the WD software; now after couple of years i am trying to read that data in a PC and a Mac but neither works;

In the PC - windows Vista, I installed the WD software but still no luck, I can not open the old profiles, 

Any idea ??? what shall I do to be able to view my backed up data??

I think you need to ruan another backup see if this post helps