Ok, so I did what Shenok said(thanks Shenok) and although the I'm still getting the same problem, the error log file has changed. I'll post it now:
<..\..\src\common\net\connection.cpp:146 psNetConnection::GetConnByIP SEVERE>
Non Server message...
<..\..\src\common\net\connection.cpp:146 psNetConnection::GetConnByIP SEVERE>
Non Server message...
<..\..\src\common\net\connection.cpp:162 psNetConnection::HandleUnknownClient SEVERE>
Message from outside received... hackint?!?
I don't really know what the output means but it looks to me as if some kind of connection is not being made? Well, at least it looks as if there is some progress being made.

Thanks for the help so far.