deployment problema

Hi,

I added an .exe (the msaardk.exe) (Microsoft Active Accessibility) as a Custom Action to my Deployment Project. At the end of msaardk.exe execution appear the dialog box with the message: "...to take effect you must restart the computer. Do you want to restart the computer now?". After this dialog box, regardless that I answer YEs or NO,it is appears the message box that says it is some problema whit the attached modul. And the setup rollback.
(The msaardk.exe works fine alone.)

Can somebody help me?

Thank you for any suggestion!
garroane