NT Schedule command ‘at’

Dear Sir,

Recently I tried to schedule a job to execute on my WIN NT 4.0 Server. I use the command ‘at’. Also the Schedule services is running. Following are the commands I key in .

at 01:30 c:adhoc.bat

Basically this command will run a batch file adhoc.bat on the server root directory at 01:30 am the next day. When I check the event log the next day, it gives the following error msgs.

Event ID : 7901

‘The C:adhoc.bat command failed to start due to the following error:’
“The system cannot find the file specified”

Appreciate if you could help me on this.