Gas issue on airsoft blow back P08 luger

Recently I went to play a game of airsoft with my friends, as I switched to my secondary (which was the luger) I only got a couple shots out of it before the C02 completly started spraing out everwhere of the top of the luger and the muzzle. I have played almost about a full year now with this gun and have not had this issue untill that day, Im not sure if its a tiny peice thats dented or worren inside of the gun, or if its just completly broken. If anyone has had this problem before or has tricks to solving my issue, that would be highly appreciated.