Missing Provider Order tab after Upgrade of WinNT to Win2K Sp4

Dear all,

After upgrading one of my NT servers to Win2K SP4, I found that the
"Provider Order" tab in Network Advanced Settings is missing. The
"Adapter and Bindings" is still here. During the upgrade, the setup
indeed complained about registration failure while registering the
components.

Can anybody show me how to reregister this UI tab? Thanks!

Francisco