Issues with MAS90 Crystal Reports X and FAS Crystal XI

Any advice on how to resolve? 

Thank you in advance for your reply. 

One idea is separate server for MAS and FAS and no link - the two act like independent applications. To update the asset accounts in the G/L, you have to enter the journal entries manually.

This is just a workstation install of FAS and the person that is using both MAS and FAS wants to write their own Crystal Reports.  There is no problem with the GL link or with running reports in FAS or MAS until the full versions of Crystal are installed - that I've found so far.  The only issue is when you install Crystal 10 and Crystal XI then try to run a report in one of them it says it is the wrong version of Crystal, but that only seems to happen when you create or modify a report in Crystal.