blocked

i put a wrong code ten times in a iphone 5s(because i forgot the code), now is blocked, i check in the owner manual and in ther says that i most enter in itunes and reset the iphone but wen i tryed to connect the iphone to itunes its said that i most put the code in the iphone for use the iphone whit itunes. can someone please help me im stock whit this problem. sorry for the orthography i dont have a very good command of english.