I replaced the cartridge on my master bathroom shower but I can't get any water to come out. Water came out of the shower head for about two seconds when I initially turned it on- at which seemed to be the normal water pressure but then it immediately stopped. Could I have installed the cartridge incorrectly or backwards (cold side on hot water side and visa/versa)? Its a Delta cartridge with the white plastic housing (for units made before 2006).