slide on mks333

[Jimm]

Hello,I have a slide that when opened with remote control will not go back in when trying with the wall mounted unit.This is always after setting at a camp ground for a few days.Took it to where unit was purchased and has been ther three weeks,No response ,i cal and they say working on issue also they have three in the shop with same problem.Any one help with this.??
JIMM