The "no band plan" error message for your P25 systems is a quirk of FreeSCAN. No band plan is needed for a true P25 system. Normally, you only get that warning the first time or two that you load a system, then FreeSCAN quits telling you that.
As far as 'no reception', that's a different issue. As
tvengr has already suggested, posting your programming file would enable someone else to take a look for any errors or omissions that need to be corrected. I would note that, in general, when importing from the database into FreeSCAN, it generally sets the system type as "Mot Type II/P25". For the 325P2, as well as all the Uniden DMA scanners starting with the old 396XT, the correct system type to use is "P25 Standard (Digital XT)".