Cannot use host network in 2.1.0

[stevie_davies]

Am running 2.1.0 in Ubuntu 8.10. Guest OS is Windows XP. Guest OS used to boot in 2.0.6 using the vbox0 interface bridged to br0 using brctl.

I changed the guest to use the new host networking feature, so have configured the adapter 1 to use pcnet interface attaced to host interface. Under host interfaces eth0 is present, and highlighted.

When I try to boot the Guest I get the following:

Failed to open/create the internal network 'HostInterfaceNetworking-eth0' (VERR_PERMISSION_DENIED).
Unknown error creating VM (VERR_PERMISSION_DENIED).

In log I see:

00:00:01.319 IntNet#0: szNetwork={HostInterfaceNetworking-eth0} enmTrunkType=3 szTrunk={eth0} fFlags=0x0 cbRecv=223232 cbSend=36864
00:00:01.319 PDM: Failed to construct 'pcnet'/0! VERR_PERMISSION_DENIED (-10) - Permission denied.
00:00:01.432 ERROR [COM]: aRC=NS_ERROR_FAILURE (0x80004005) aIID={e3c6d4a1-a935-47ca-b16d-f9e9c496e53e} aComponent={Console} aText={Failed to open/create the internal network 'HostInterfaceNetworking-eth0' (VERR_PERMISSION_DENIED).
00:00:01.432 Unknown error creating VM (VERR_PERMISSION_DENIED)} aWarning=false, preserve=false
00:00:01.439 Power up failed (vrc=VERR_PERMISSION_DENIED, rc=NS_ERROR_FAILURE (0X80004005))
00:01:00.841 VRDP: TCP server closed.

[Frank Mehnert]

Please could you attach the whole log file? Thank you!