IPOD TOUCH 4th GENERATION/ICLOUD BACK-UP is not WORKING HELP!!!!!

When I try to Start Icloud Backup this is the scenario

error message - ipon touch will no longer backup to computer autoatically when you sync itunes

Me - ok

Error message - Turning on Backup - Failed -

Error message advice - Turn off Airplane Mode ( Me - It is not on) or use Wifi to enable icloud backup -(Me - Wifi is on and listed)

Now what? I purchased a song via my ipad HD and wanted to put it on my ipon (where all of my music is) - never had this problem before.

Note: Got a new computer last year - ipod in one of its error messges said that I needed to delete the old computer - I thought I did that via itunes - removed old one and it showed new one in itunes - how do I delete from ipod - the main issue here is I DO NOT WANT TO LOSE MY MUSIC -

Also - it will not allow me to software update - via wifi or when it is connected to computer - it checks for update and then gives error message Unable to check fo rupdate an error occurred while checking fo a software update - Try Again - to no avail -

I am afraid to restore because I DO NOT WANT TO LOSE MY MUSIC

I would gratefully appreciate any advice - Thank you in advance

With a Grateful Heart,

Cynthia