In a mixed (M$ and NetWare) environment, the NetWare client install will always put itself on top in provider order at the detriment on M$ Networking. In your network properties | advanced settings | provider order tab, there is the GUI to change provider order. It can also be done with reg hacks.
code:
$HKLMSCCSCNPO = "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\NetworkProvider\Order"

$POrder = ReadValue($HKLMSCCSCNPO,"ProviderOrder")
Select
  Case $POrder = "Cwbnetnt,LanmanWorkstation,NetwareWorkstation" 
    Or $POrder = "Cwbnetnt,NetwareWorkstation,LanmanWorkstation"
    $RC = WriteValue($HKLMSCCSCNPO,"ProviderOrder","LanmanWorkstation,NetwareWorkstation,Cwbnetnt","REG_SZ")
  Case $POrder = "Cwbnetnt,LanmanWorkstation"
    $RC = WriteValue($HKLMSCCSCNPO,"ProviderOrder","LanmanWorkstation,Cwbnetnt","REG_SZ")
  Case 1
    ? "DOH! Check Provider Order!"
    Sleep 10
EndSelect
This code is specific to my environment. YMMV
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