problem within openvpn roadwarrior (remote access)

[samnet]

Dear All
I have setup several openvpn using the remote access option, but I have seen a strange problem when I use the openvpn own app to login, I get connected. but when the next user logs in, he can do activity but the 1st user cant.
I kept testing things out. so shall I conclude that roadwarrior via openvpn is limted to only 1 user at a time?
how can I make sure that several users can connect and use vpn at the same time?

[MoonbeamFrame]

In the OpenVPN server configuration check that the number concurrent connections meets your needs and that you are not restricting the number of sessions elsewhere in your configuration.

I leave it set to the default value and have many 10's of users able to remote-in at the same time.