John and Cheryl,
Your hydraulic system is not holding pressure. Likely a loose/bad hose fitting or even a seal or ram failure. If you are up for it, check the hydraulic rams on all slides and landing gear. Same inside the hydraulic motor/pump compartment. If you cannot find a significant amount of fluid leaking outside the system, my guess is that it's a seal issue.
Consider contacting Lippert to see if they can walk you through a series of checks. Their number appears on the Portal page on the left.
Others here will certainly weigh in with more ideas.
Jim