Steam Auth Failed????

What does it mean when you get Steam Auth Failed?? Is that ban.. if so how do you move around it??

I also had this problem...it means that the server know there was sth wrong with your AlterIW Client and kick... (maybe hack...)

If you hack, it's a 6 hour suspention. If you continue to hack, you get banned completley

.. k how can I bypass that.. IP change? anything else or no?

Edit:
Now it says "Banned From Modern Warfare 2" on pop up message when I start the console/client... Eh I tried using the unban tool and that happened.. what does that mean?