i often use something more simple

DECLARE @TARGET INT

WHILE 1=1

BEGIN

DECLARE KILLCONS CURSOR LOCAL FAST_FORWARD FOR

SELECT SPID FROM MASTER..SYSPROCESSES WHERE DBID = DB_ID('DB NAME') AND SPID >=50

OPEN KILLCONS

FETCH NEXT FROM KILLCONS INTO @TARGET

WHILE @@FETCH_STATUS = 0

BEGIN

EXEC ('KILL '+@TARGET)

FETCH NEXT FROM KILLCONS INTO @TARGET

END

CLOSE KILLCONS

DEALLOCATE KILLCONS

END

the infinite while is to take care of pesky applications that keep reconnecting, so you just manually break the loop when you feel like it