I don't remember what address we used, but when we went last year we had the same problem. Maybe try the physical address of the hotel. How about Kissemee as the city? Hope someone else can help.
I found this site online that has the GPS address for all the parks, just click the links for the parks and scroll to the bottom, there will be a GPS address and a mailing address.
We always type in the full address of our resort. It even took us a back route to get to AKV. We thought it had gotten us lost, area looked nothing like WDW and no traffic but low and behold we turn a corner and there is the entrance of AKV.
Use this site to find anything. Move to an area, switch to satellite view then click on your spot to get latitude/longitude. When we went to Parc Soleil a couple of weeks ago I clicked right on the guard shack.