Lets start from the basics: Can you tell me the name of your config file? Does it have an extension of "ovpn" or "conf"? Did your sysadmin give you only that config file? Did he give you any other files? Can you open that config file in notepad and see if it is readable? Do NOT post it here (or anywhere) - it may have your keys embedded in it. Does the file contents have anything that seem to be like C:\full\path\to\file? This may need to change to reflect where you have the other OpenVPN files on your n900. If all these are fine, there are many other things to check, but it's getting late here and I need to sleep, so you may also want to try that config file on a regular Windows / Linux machine (Linux preferred) and see if it works. I'll check back here later.