geeting this error while taking the backup of sqlserver its urgent

hi all

i have created one backup exec server in work group enivroment from that backup server i am taking the backup of sql server,i have created the  seperate user for installaing the backupexec on media server and createdthe sameuser on my sql server with the same password,i have tested the creditional and it is succeful

i have  pushed the agent for window to my sql server when i am doing theremote installtion it is only shoing my agent for window and backup exec,but when i was instlling the  backup exec media server and entered my licence key it is showing me 3 things

agent for window

agent for application and db

backup exec server whichi have  checked for installtion

now whe i am doing the remote installation y i am not geeting the option of application and database so i have selected the agent for window and installed them created backup job for my sql

but i gotthis error

Job ended: Saturday, October 13, 2012 at 6:35:45 PM
Completed status: Failed
Final error: 0xe000ff19 - A communications failure has occurred with a SQL Server resource.
Final error category: Resource Errors

For additional information regarding this error refer to link V-79-57344-65305