The OpenVPN protocol requires the client and server to have synchronized time. If the time on your local PC is incorrect you may see the error TLS Error: Unroutable control packet received from in your logs.
To resolve this issue please configure your PC to automatically sync with an Internet time source. For help see http://windows.microsoft.com/en-us/windows/set-clock#
You need to install and configure an NTP client. Refer to the documentation for your distribution for further instructions.
Please refer to the section Correct Time on this page http://www.dd-wrt.com/wiki/index.php/OpenVPN