If you've never owned a paintball marker, and especially a paintball gun that you are not familliar with, do NOT buy one off the internet.
As for having the mistake already done.. that's **** is called microline. And it IS ****. goto the shop and get it replaced with steel braid, and a quick disconnect. If the leak is not from the hose, it's probally becasue the velocity is to high, or some other seal in the gun is toast. Depening on what you paid for the gun, you may have gotten a good deal. Watch the video, and that will help you diagnose any problems. If you have more information, feel free to post it.
You'd have to be Crazy to be sane in this world. - Nero
Omnipotence ain't all it's cracked up to be.......