Scheduling scm tasks using Windows at command

So I wrote a simple batch file to handle some scm tasks, such as accepting changes to my workspaces automatically.

The batch file is:

c:\jazz\scmtools\eclipse\scm --non-interactive accept -v -r URI -u MYSELF -P PASSWD -t "My_workspace"

Works fine when running it manually from the command line

My at job:

at 9:00 /every:m,t,w,th,f cmd.exe /c c:\accept.bat

Windows just tells me "Could not start".

Anyone else managed to set up automated tasks using the scm CLI? Could you give me some pointers please?

Thanks in advance.