Script to delete file from logged on user profile

I'm trying to create a task which will delete an exe file from the logged on users desktop so far I have not been able to do this on a windows 7 machine from within Altiris 7.1 sp2 to a machine. I have tested the script directly on the machine from a CMD window and it works fine  but it won't work from the quick run option from the Task Status window. The script I have is as follows: Del "%homepath%\Desktop\Elior Signature-v2.9.exe"

If I put a pause line in it states: Could Not Find C:\Windows\system\Signature-v2.9.exe

Am I using the wrong variable for the logged on user? I can't find an answer to this although I'm sure it'll be simple in the end any help is greatly appreciated as always. thanks