NIS 2010 and PM 8.0 incompatibility

Hello,

 

    I installed NIS 2010 on my Windows XP SP3 machine last September.

Today, for the first time since that installation, I tried to use my old copy

of PM 8.0. It balked. PM gave me error 27 - cannot lock drive (during startup

in XP after running PM to resize my hard disk). I tried turning all NIS 2010

features off, but PM would still not work. I removed NIS 2010 and guess what -

PM worked flawlessly.

   Is this a known incompatibility ? Or, is there a workaround other than removing

NIS 2010?

 

Thanks