Wohooo, that did the trick! Thank you very much OmarAcero for providing a solution!
For people with the same issue, below are how I got it to work:
I copied all of the files under OmarAcero's link "Files client 2012-04-10" and extracted them to the right locations (in the respective subfolders at the client folder). the data.ini file differed a bit from my previous one where 2 entries were missing. Now i have 4 entries in the data.ini file and 2 two additional entries. The referred entries are available in the package:
which I extracted to the root folder of the client. I then only had to change the IP address in the clientinfo.xml file to match my external IP address in order to connect to the server.