First, Welcome to the Forums ... now that the pleasantries are taken care of ...
Sorry, but we'll need more info to attempt any help...
I'm assuming you're running Exchange 2003 SP2?
SBS 2003 SP2?
BES 4.1 SP4 ?
SQL 2000 SP4?
Need details on the environment ... what guides you followed to do the install ... Oh, yeah, and an exact error might help.
I don't mean to be rude, and honestly I apologize for coming off a bit snarky ... but ... How to ask a question