Upgraded from WPMU 2.8.4 to WPMU 3.0.1 and the Network link under Tools menu is missing

Hi,
I'm still a rookie in WPMU!
I upgraded from WPMU 2.8.4 to WPMU 3.0.1 and the Network link/item under Tools menu is missing.
I upgraded using the automatic upgrade.

Is that normal?
If not, how do I correct the issue.
Thanks,
Charles