WordPress MU

I was just upgraded to wpmu 1.5.1 and over all that's running smooth as well. Thank you.

I found small problem where this is too disturbing my work. When I use engine 1.3, I can switch from one blog to other blog easily with no need to login. But, after upgrading, I need to login everytime jump to other blog.

Address bar showing this link...
/wp-login.php?redirect_to=%2Fwp-admin%2Fwpmu-admin.php

Have anybody ever seen the same problem?
I don't know this is one of including change in new version or just an error.
I need a suggestion to make it fix. Thx.

Did you put the salt and key in the config file?

Oh dear.. I was passed this step.
Thank you lunabyte, problem was solved.

You're so kind. Thx