Data tranfer nokia n70 to nokia 5310

Hello,
I have nokia n70 now it is lost fortunately i have backup of my contacts and other items in my pc in software pc suite now i bought a new nokia 5310 (xpress music) i am trying to copy of my contacts from pc to memory card and i got success but when i go in contacts and select to call any contact the contact is not displaying contact field it is displaying in gallery > folder pankaj>backup files>airtel phone book>select open then display the all names only if i select any name i got message on display file format not supported please help to activate my phone book