Do a tracert command and see if your connection is going trough 193.251.131.145.
We have this issues too. Let me guess, you haven't got any problems before CWC patch.
To do a tracert command
1. Run command prompt as admin
2. Type: tracert 195.122.154.1 >c:\tracert.txt
3. After it is done, you'll have a text file on your c drive and just copy the text and post it here.