If you want to make any sort of multiplayer game that involves communication over the net, you're going to want to look outside DBPro's buildin connectivity command set as it's highly intermittent as reliability goes.
You'll want to take a look at an external plugin or library, such as Benjamin's excellent "MultiSync", which is what I use for all of my connectivity needs. I'm currently using it to build my MMORPG, and it is working very reliably. Here is the relevant link:
http://forum.thegamecreators.com/?m=forum_view&b=5&t=99188&p=0
I highly recommend this plugin for all your connectivity needs. It's simple, fast, efficient, and most importantly it's bug-free.