Hi
LV 6.1 comes with one remote panel license. That means that only one user can access (see/control) the VI at the same time. If more users must see the VI simultaneously, than you have to purchase more lincenses. Call your NI office, they'll help you. You can buy licenses for 5, 20 or 50 users.
See this link for the prices (US): http://sine.ni.com/apps/we/nioc.vp?lang=US&cid=11017
Luca
Regards,
Luca