i needed the windows net work to work in guest, so i changed to a static ip near same range as my other machines, all the rest is the same.
running ubuntu and XP.
smootwall router. dynamic range is above 100.
this machine is set up similar. but no errors ATM, it was disabled also, and i don't remember why.
might have been same problem with hava trying to use the VB adapter to find the server.
one thing i do know, was having a lot of issues with loosing host machines resolving names.in the middle of a query.
but as i remember the guest OS did work with the networking, and once it is fired up, i don't think it was an issue. then it would use the host name of the guest.
Microsoft Windows [Version 6.0.6002]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.
C:\>ipconfig
Windows IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Link-local IPv6 Address . . . . . : fe80::acf6:549d

933d%13
IPv4 Address. . . . . . . . . . . : 10.1.1.203
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 10.1.1.1
Wireless LAN adapter Wireless Network Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Ethernet adapter VirtualBox Host-Only Network:
Connection-specific DNS Suffix . :
Link-local IPv6 Address . . . . . : fe80::b1e6:613c:d514:5f78%16
IPv4 Address. . . . . . . . . . . : 10.1.1.25
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 10.1.1.1
Tunnel adapter Local Area Connection* 6:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Tunnel adapter Local Area Connection* 11:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Tunnel adapter Local Area Connection* 16:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Tunnel adapter Local Area Connection* 13:
Connection-specific DNS Suffix . :
IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e50

33de:f5fe:fe34
Link-local IPv6 Address . . . . . : fe80:

33de:f5fe:fe34%14
Default Gateway . . . . . . . . . : ::