Ipod help!

Hey,Well One day i decided to go buy some songs for my ipod i bought them than i went to bring them over to my ipod icon thing and noticed it wasnt there so i clicked out in hopes when i clicked back in it would be fine and i had a itunes pop up and it says the software required for communicating with the ipod is not installed correctly please reinstall itunes to install the ipods software now i have tried to reinstall but it will not work,i have no clue what to do and im very frustrated please help!