jesone430

Hope you guys can help.. I just installed the black projectors , and had to change to the h7 hid bulb type from the stock d2r , as the projectors fit the h7.. The shop used adapters to use my stock mb ballasts. However when I turn them on after the car is started the hids just flash once and dont come on? after clicking the switch on and off several times they come on . did they miss something here? any ideas as to why its happening/ thx for the help..i didnt have a problem before the conversion my stock hids would light first shot..