Do you know of a backdoor access into MS SQL Server 2000 Enterprise

The default database for the Administrators
group is SMC_DB. I deleted the SMC_DB in order to
re-create the SMC_DB with bigger maximum data file sizes.
When I launched Query Analyzer, it tries to open a
connection into SMC_DB, but SMC_DB no longer exists. I tried
logging in as sa, but SQL Server complains that sa is not a
trusted connection. Help!