No water coming into dishwasher

I unscrewed the old water inlet valve from the frame of the dishwasher so that I could manuever my hand around to the backside where the rubber hose was connected. That was the easy part. I then had trouble holding the old valve while trying to unscrew the hot water copper tubing so I screwed it back on the frame. My dishwasher is close to 18 years old and I think that was part of the problem. After soaking in WD40, I finally got the valve out. Then I had to remove the "L" shaped connector to put on the new valve. Everything went back together a lot faster and it's like I have a new dishwasher again. By the way, I am a 53 year old female so that may be why it took me so long.