Hi,
I had the same 'application popup' error in nsrexecd with 6.0.x and w2000.
Solution (after many tears rolled down...)
modify w2000's registry key:
\System\CurrentControlSet\Control\Session Manager\SubSystems\SharedSection
take, from default:
1024,3072,512,512
to the following:
1024,3072,2048,512
(of course rebooting)
Has resolved!
Bye
Nicola