So, you're not using the split function to start the news? but just sending a "NEXT" signal from one computer to another?
If so, it's a completely different scenario
In the main computer:
1) go to Configuration/Network/Split and set "Remote Host ip:port" of the second computer

2) set the property/flag "At start - Enable Bit 4" and "At End - Disable Bit 4" on the first news item

In the second MB STUDIO:
1) go to Configuration/Options/Options and enable the following option:

This way you'll be able to send PLAY, PLAY ALL, LIVE, NEXT, AUTOMATIC from one MB STUDIO to another MB STUDIO (just change the bit number accordingly)