bugs

hello coders, I just bought a php auction script for my site,and I discovered that some options in admin page don't work.I need someone to solve this problem quick an professionaly. the problems are in the next areas: ? ? ? payment methods(can't add another one) ? ? ? general layout settings(changing logo) ? ? ? fonts editor(I can not edit them) ? ? ? auctions(adiing a new one/it says:incorrect pass,even if I don't have one for this) ? ? ? ? I will provide the ftp, user and password .