SkateBoarding-Ollie Problems.?

Hey , ive been having problems with my ollies. The problem is that i dont think the back end of my board is coming up and i AM jumping after popping. I no the reason why, its cuase my foot is getting stuck on the middle of the board(foot wont slide). The reason i think this is happening is cuase i do not have skateboarding shoes. Also , i borrowed my deck from my friend, and the bottom of it is metal. Is this why im having these problems?