Well 2moons, like every game, has DC/Lag problems.Every patch, that comes out, is supposed to fix them but situation sometimes get's even worse.I found these tips on forum, so Player's tried them out and they worked.Well of course you can't get rid of DC'ing completely, but you can try to minimaze it :P. And these are tips to do it:

2)Sound Card updating.
We need to get them updated, but you need to know what card you have first.

There are a couple ways of doing this. The first way is to right click My Computer and click on Properties. Then click on the Hardware tab and click on Device Manager. Once in the Device Manager section, expand the link by Sound, Video & Game controllers. Here you should see the type of sound card you have installed in your machine.

The second way to find out what kind of sound card you have is to click on the Start button, then click on Run and once the Run box opens, type DXDIAG. Now click on the Sound tab up at the top and the name of your sound card will be displayed.

If you have an AC.97 (or any Realtek) try here:
http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=1&PNid=14&PFid=23&Level=4&Conn=3&DownTyp