Okay, I'm confused.
I have a 35F Sunstar and the Passenger side Slide is at the back of the MH. It's the Bedroom. The Front slide is behind the driver. So if you are getting water on the Passenger side from the rear bedroom slide then you really have a problem. And the some goes if you are getting water from the Drivers side slide on the passenger side.
So please help me help you, are you sure about the model? and or the side that is getting wet from what?
No matter what if it is still under Warranty take to the dealer ASAP.