SQL single to multi user mode

Hi ExpertsI have to alter my database to multi user mode from single mode but getting error as below pls suggest.[quote]Msg 5064, Level 16, State 1, Line 14Changes to the state or options of database 'abc' cannot be made at this time. The database is in single-user mode, and a user is currently connected to it.Msg 5069, Level 16, State 1, Line 14ALTER DATABASE statement failed.[/quote]