Help.....can't log in

[coolsystems]

I just booted from the backtrack2 cd,& when I get to the login screen it tells me "login incorrect"
any ideas?
it tells me to use "root"(without the Quotes)for the username,& "toor" for the password.I've tried probally a hunderd times to login,but I can't anyone have any ideas?
Thanks

[imported_rokrmc]

The iso maybe corrupted or try re-burn again.Verify the md5 before burn.Burn with minimum rate, use imgburn.