My connector from the master cylinder line wont stay in the connector (the one with the clip that holds it in) from the slave cylinder, it popped out one day and lost the plastic sleeve that holds it in. I couldn't find the sleeve anywhere to purchase so I ordered the hole new line and use that one from it, got it installed and "finely got it to pump up" but then it pops out again! How can I get it to stay on?

