Help! My keg won't hold pressure!

I have a keg that’s approximately five years old. I haven’t used it in almost two years. When cleaning it, I picked it up to shake it around, and it leaks! I changed out the rubber gasket around the lid and used lube as well, but it still leaks. Any suggestions?

Where is it leaking from, and did you pressurize it with CO2?

I got it figured out. It did, in fact, need a little CO2. Thanks for the suggestion!