Windows Task Scheduler - Task Won't Die

Question

I have a task scheduled to run daily that executes a .bat file and I have checked the options for ending the task after an hour and forcing it to stop if it does not end when requested to, but it runs indefinitely until I manually kill it. Any ideas? (I do not want to use pskill in my script). Script below:

sqlcmd -S MyServer -U username -P password _Q "BACKUP DATABASE x to y"
net use z: "\\server1\project"
cd C:\trial1
copy * "Z:\backups"
net use z: /delete
exit

Answer 1

Thanks to Hans Passant for the answer! See below:

Taking away 'net use' and just directly copying to the server cleared up some error that the task scheduler was getting stuck on.