Restore tape from BE 12.5 using 2012

I am evaluating BE2012 and had to recall year end tapes from 09 that were done using BE12.5   I was able to inventory and catalog the tapes, a restore said completed successfully but no data was restored.  I have anopther system running BE2010R3  and that was able to inventory, catalog, restore, and the data was recovered.  Why would 2010R3 be able to recover data but 2012 did not?