how to repair suspect db

I am trying to repair a suspect database.
The problem is that when I run:

EXEC sp_resetstatus property;

it gives me this response:

Warning: You must recover this database prior to access.

when I try this:

ALTER DATABASE property SET EMERGENCY;

it also fails:

Msg 5011, Level 14, State 7, Line 1
User does not have permission to alter database 'property', the database does not exist, or the database is not in a state that allows access checks.
Msg 5069, Level 16, State 1, Line 1
ALTER DATABASE statement failed.

what do I do next?
Thanks.

Try This:

EXEC sp_resetstatus [YourDatabase];
ALTER DATABASE [YourDatabase] SET EMERGENCY
DBCC checkdb([YourDatabase])
ALTER DATABASE [YourDatabase] SET SINGLE_USER WITH ROLLBACK IMMEDIATE
DBCC CheckDB ([YourDatabase], REPAIR_ALLOW_DATA_LOSS)
ALTER DATABASE [YourDatabase] SET MULTI_USER

StackExchange Database Administrators Q#175844, answer score: 4