I'm trying to replace the fuel filter, one side has a green clip with 2 'ears' on it, press these ears and the line slides out easy. the other line from the fuel tank has a completely different clip, it's blue and the outer housing surrounds the 'clip'. I've tried the quick disconnect tool that slides into the clip, I've tried pressing the blue part that is outside the clip housing, and prying on the clip. No luck so far. Can anybody give me some advice on this??