Samba ADS and off-network share access

Hoping somebody may point me in a right direction. I'm on the opensuse 12.3, it's a work laptop and I'll also need to run Win7 on it, I'll use KVM for that - what I want to do is to share some of my home folders (Docs, Downloads, etc) with the Win7 guest thru samba. I joined the windows domain (used yast) and everything works great - I can log in on and offline, the only problem I have is when I try to access samba shares (my home folders) when I'm not on the windows network - everything works when I VPN into the network, but the moment I disconnect samba can't authenticate when I try to access shares.

Any idea what should I check?

Thanks,
art