but i cant seems to make a way for me to drag my songs into the phone

i use some iphone pc suit manager . and now i dont see a thing in my iphone but i still see those thing appear in my iphone pc suit . how ? hlep me guys. urgent

iphone pc suite much more easier, each time i sync , they will ask me to copy my itunes song into my iphone by rewriting it and delete my iphone songs . pc suite just drag and drop . easier . so now have to restore firmware and jailbreak again ?