The List Window Contents script works for me. It's possible, you miscopied or compiled the script? You can always download mine here: http://tr.im/CWCf
Just make sure you have an open finder window when you run the script, it should open textedit and paste the contents of that window in... Fast user scripting I don't use, and my mac only has one account so... I'm no help there. I glanced at it, and would just say to triple check that you've named the script exactly right. Capilization and everything should be the same as the name of the user you're trying to switch to. Good Luck
