Are you trying to install it on a new computer?

If so, it's not going to work as, unless you have a floating license, Maya will only work on the machine you originally installed it on because the IP address is part of the license.

You can get in touch with Autoddesk and they'll send you over a new license without any bother. I've had to do this twice after upgrading my computer.

I have to say that the customer service was better through Alias than it was through Autodesk, I had to wait a week for my new license throuh them where as Alias was a couple of hours...... in their defense, it was some time ago (just after the take over) so they may have sorted things out since then.

anyway.......I hope this is of some help,

Mat