COM+ and DTC problems on some computers on my network...

Hi,

to solve a remote debug issue I havre to pley in the DCom config of some
components.
during these steps, I have found that my COM+ and DTC components not works
correctly on some computers!!!!

I can't see the properties pages of the "my computer" under the dcomcnfg
config tool.
clicking the "Com+ applications" tree node cause an error:
Error code 8004E00F - COM+ was unable to talk to the microsoft DTC

I have reinstalled DTC and COM+ (like describe on some articles on the web)
without more results.

My non working computers are : Win 2003 servers and Win XP SP2 stations
and also I have Win 2003 Servers and XP SP2 station where the same
components works fine!

I have tried all of these steps:
http://extremetechsupport.com/forum/....phtml?t=57813

now I am out of ideas... and you?

Thanks.
Jerome.