Windows 7 - Open vpn and windows 7

Hello

I'm pretty new to windows 7 and my last experience was with windows 98
In the meantime i was amusing myself on osx

My problem at the moment is as follows
I have a linksys router running at a small office with dd-wrt on it and it runs openVPN
Tunnel and all other things go well i have to start the openvpn client on Windows 7 in administrator mode. When i try to copy a file from the SMB-server running on an osx leopard server i get a warning box (see attachment)

I think it has something todo with UAC or something but i'm still puzzled
For thos who know about openvpn. It creates a new virtual ethernet interface (tun/tap)
on my network interface page i can change my normal ethernet connected network to home/work or public... i can't change it for the virtual ethernet interface it's just called "unidentified network" and "public network" and i can't change them... (see attachment)

Any ideas?

ty