im not even getting to ahcmd mate.
it tryes to connect to the server and fails straight away.
I'm not really sure what's going on, then.
I tried to reproduce the problem, but I can't.
There is another thing you can try, though.
Instead of trying to his ahcmd, try creating a batch file to do something really simple (like copy a text file to a new name or something), and see if you can run that through psexec.
It still sounds like an access permissions issue to me, but I don't know what to suggest to solve it.