Hi Oscar,
Thanks for the feedback, I have searched SPRs as well and I did not find anything related.
I was about to create a PMR yesterday, when I have tried it on other machines, and it worked!
I have run the same sample database on 2 different machines and the events worked.
I have uninstalled Domino Clients from my machine, deleted the installation folder and re-installed 9.0.1, the problem persists.
After installing fp1, the problem is gone. knowing that on the other machine, fp1 was not installed.
I didn't change anything in the client settings after sp1 installation. Very weird, hope that this problem won't occur on my client's machines.
Note that I have already Lotus Client 7.0.2 and 8.5.x installed on the same machine, IBM Client 9 upgraded the 8.5.x version.