Postmaster doesn't start under CygWin (semctl failed)

Thanks for help.
Now I have my postgres user.

And I saw I'm in postgresql 7.3.2.
If  I want to upgrade to 7.3.3 do I have to uninstall ?  Do I need to
upgrade ?

I tried to start postmaster, without success. The service stop with no
message from postmaster.

So I gave a look at /usr/share/postgresql directory
I saw the owner was not postgres. So I tried a chown or chown -R again
on the data directory and  the owner stays always and always my NT Login
User.

I started postmaster under bash (while IPC-daemon was started like a NT
service) and I used -d 5 parameter to debug.

The message received was :

IpcSemaphoreInitialize: semctl(id=2, 0, SETVAL, 0) failed: Invalid argument


Where is the problem ?

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