Problem replacing run flats with standard tires

[isellpower]

I am out of town and my wife took her 2007 x5 4.8 Sport with the 20" wheels to the local Firestone tire center to have her run flats removed and standard tires put on. Firestone said they could only get one tire to seal and ended up taking the other 3 to a Discount Tire down the street. They also said they could not get the tires to seal. To sum it up, both places claim that because it came with run flats the rims are not made for standard tires and the sidewall just slips down inside the wheel and wont seal.

I told them that they managed to get one to seal so their hypothesis was obviously wrong. This is in Indianapolis by the way and should have some experience with larger wheels and tires as well as run flats.

Stock wheels and the new tires are the exact same size as stock, any ideas or experiences with this?

Thanks.