I sync my iphone with two computers. My contacts from my work laptop and all my music and pictures with my home desktop. I have a few songs on my laptop. When I right click on my music from my laptop the option to create ringtone is there. On my desktop it isn't on any of my purchased music. Since that is where I have all my songs I can't convert any of them to ringtones. Also when I right click on a song on my laptop there is a choice to convert selection to AAC. On my home computer at the same place it says convert selection to MP3. Does anyone have a clue what is going on here? Any help will be appreciated. Thanks in advance.