I have three OES2 SP1 servers setup as follows:

SRV1 (DA server) on local LAN:
net.slp.DAAddresses =
net.slp.isda = true
net.slp.isBroadcastOnly = false
net.slp.useScopes = SCSLLC

SRV2 also on local LAN:
net.slp.isda = false
net.slp.DAAddresses = 192.168.170.1
net.slp.isBroadcastOnly = false
net.slp.useScopes = SCSLLC

SRV3 in a DMZ zone:
net.slp.isda = false
net.slp.DAAddresses = 192.168.170.1
net.slp.useScopes = SCSLLC
net.slp.isBroadcastOnly = false

All my clients are configured with the scope "SCSLLC" and point to a DA 192.168.170.1

When I login, the login script throws a following error
"LOGIN-LGNWNT32.DLL-890: The specified server is unknown.
LOGIN-LGNWNT32.DLL-430: The following drive mapping operation could not be completed.
[R Y:=SRV3\FILES:]
The error code was 8884."

once logged in, through network neighborhood I can browse to the server. I can also connect to it through iManager and ConsoleOne. No firewall packets are dropped in the communication.

Is this an SLP problem? How can I troubleshoot it?