ERROR just after i closed FS9..

Ciao to all,please give me suggestions...I use FS9..and than click "close"....FS9 closes..but after few seconds a window opens telling that there is an error in FS9..So i sent the error report to MS that tells me I miss an update file called FS9Update...But this file I've got it since more than 1 year..What I did, before this problem, with FS9 was to take away the fs9.cfg file....start fs9...than quit it and reinstalled the "first" fs9.cfg I had before...I also added the FSUIPC.dll version 3.51 replacing the 3.5 I had installed in MODULES...It'a registered...Help please....!!!If I try to re-install the FS9 update I get a msg telling that I risk that other add-on or programs in FS9 wont' function...So what do I have to do??Thanx