Water Thawing Then Freezes???? In Fridge???

Hi there I really hope that you can help me solve this problem:

My Roper 18cfoot 2 door refridgerator(freezer on top, fridge on bottom, NOT A SIDE BY SIDE) is draining water into my fridge compartment via the back interior wall. I have to put a dish there to catch the water and I cannot put anything on the shelves at the back of the fridge??? Some times I empty the dish and it is water and others it is frozen???:eek: I did notice that there is a type of spring on the roof of the fridge and it is sometimes frosty?? Sorry if this is cofusing its hard to explain when I dont know the names of the components :confused: .
I can get the model number if you require that, but if it helps at all to know that it is the kind that can have a water hookup to make ice, although I have never had that option (in the 7 years I have rented here with the same fridge) I do have a drip tray in the bottom of the fridge on the exterior but it has not had any water in it for some time??? :confused:
I do remember in the past I did empty that out but it didnt need to be emptyed very often at all. PLEASE HELP:(

Hi there! Thanks so much for the quick response. I thought that by unplugging the fridge for 10 mins and replugging it in did the trick because the fridge was dry all day until I just went to get the model number for you and the little dish that I have in the back of the fridge was almost full of water!!??? :mad: :confused: :eek:
here is the model # RT18ECRFWO1 It is a Roper white on white fridge with seperate freezer on top.
I had the fridge pull out from the wall on Saturday to see if I could see the drain hose but the back of the fridge is all flat and there are no exposed parts??? :confused: :confused: :confused:
thanks so very much again!

Oh my gosh thanks very much! But I really dont see it in a diagram??? help please lol

And where am I removing a back panel? inside the freezer or out side on the back? I ask because the one on the back goes all the way from top to bottom not just in the area where the freeezer is???