How do i get my songs from an old iTunes account onto a new one?

i have 3 iTunes accounts. 2 were made around 2006-2007. one was made in 2010. i made the 2 older ones on the same computer, but for some reason can only access the songs on one of them. i had some really good songs on my other, but can't get it to show my songs. what do i have to do to get this to work like it should?How do i get my songs from an old iTunes account onto a new one?
There are many kinds of such softwares if you google. And i prefer iTunes to iTunes Transfer to any other.

it can backup iTunes library and backup iTunes playlist, songs, video to computer and USB storage, transfer iTunes library to new computer, it can also transfer the with the iTunes utility you can backup/recover/transfer your whole iTunes library and media files easily.



You can know more from: http://cucusoft-itunes-to-itunes-transfe



Hope you can like it!