He's using version 11 (XI). The .rpt file format is not compatible with 8.5.

>Which versino of Crystal Reports runtime do you need? I had this headace a couple of years ago and ended up just using the 8.5 runtimes - which worked even though my reports were written with a later version (I think we had to make a few minor changes to a couple of the reports to fix a 'feature not found' problem)