Error 0: Timeout Expired HYT00 when trying to backup DB's

[Iam74gibson@houston.rr.com]

I am getting this error when I try to back up the larger DB's on my
server. The smaller ones back up ok. Is there a parameter I can change
to increase this timeout? I have gone into ODBC, Query Analyzer, and
SQL server properties and played around with some settings, but nothing
seems to work.
Any help is appreciated!

Phil