Executing A Reboot Command From SQL

Here is the block of the sproc that I?ve created. All lines execute
fine except for the ?exec master..xp_cmdshell @reboottc?. In order to
make this work from the query analyzer I had to set the MSSQLSERVER
service to have the same credentials as the thin clients we are trying
to shut down, that means the service is running as an Administrator on
the sql server with the same u/p as administrator on thin clients.


declare @RoomNumber varchar(6) -- for testing

set @RoomNumber = '1144' -- for testing

DECLARE @RoomIP varchar(15), @RebootTC
varchar(120), @shutdownStart varchar(20), @shutdownEnd varchar(85)



-- @ShutDownStart and @ShutDownEnd will be used
with the @RoomIP to build the shutdown command sent to the thin
clients

SET @ShutDownStart = 'shutdown -r -f -m \'

SET @ShutDownEnd = ' -t 5 -c "Mandatory
iConnect Reboot issued during guest check in/out process"'



SELECT @RoomIP = IP FROM Rooms WHERE
RoomNumber = cast(@RoomNumber AS INT)



SET @RebootTC = @ShutDownStart + @RoomIP +
@ShutDownEnd



-- print @RebootTC -- for testing



-- @RebootTC ends up looking like the line below based on the
@RoomNumber

-- shutdown -r -f -m \172.18.16.103 -t 5 -c "Mandatory iConnect
Reboot issued during guest check in/out process?

-- Also the command below runs correctly when executed from SQL Query
Analyzer


EXEC master..xp_cmdshell @RebootTC