Disconnected Network Drives on my notebook

Around 15 mins after running my login script via kix32,
if I go into my computer or any other Explorer window, I
see that all my network drives are disconnected. I can
correct this by running my logon script again. My machine
never used to do this.
Does anyone know how to fix it?
BTW I have used a registry patch on the local
machine...services/lanmanserver/parameters/autodisconnect
of -1 and it doesn't seem to have had any effect.

Are there any other places that contain this type of
entry? the server OS is NT4 properly patched.

Thanx
Brush