OpenvVpn and client version 2.1.4

I setup a mikrotik rb750gl version 5.22 and vpn server. I have a problem with openvpn client version 2.1.4, Windows and Linux. The connection is reset.

Mon November 26 21:35:10 2012 Connection reset, restarting [0]
Mon November 26 21:35:10 2012 TCP / UDP: Closing socket
Mon November 26 21:35:10 2012 SIGUSR1 [soft, connection-reset] received, process restarting

Can you help me?

Thanks