Mapguider server error 500

[Cyberskip]

Hi everyone,

I'm at my witch end. I'm keep having this stupid error on several
clients.

In our organisation we've got two servers, on borh off them is running
IIS, MapGuide 6.5 and several other applications. The oldest one of
the two is to be replaced bij the younger one. But, .......... the old
one works and when I link to the newest server I get on several (not
ALL) clients that stupid MapGuide Server Error 500 call which says
that MG is busy and unable to .........

Does anyone have a clue what's wrong? My dealer is looking at it, but
can't seem to put his finger to the spot. Any help would be greatly
appreciated.

Thanks in advance.

Ed