sv - server
cl - client application



add your server and client app into that exclusions list and then try to run it. also what antivirus program you have?

but trust me, better use anet then 3dgs mp. if you want to publish a commercial game i believe you'll find 40 USD (not sure of the exact price) to purchase the anet license.

or you can use unfinished GSTNet plugin (0.7 version i think) but i'd suggest ANet - it's better, i saw that myself