I both this Sansa clip 2 GB, mp3 last year. I dod not get installation cd. Anytime when I connacted to my computer it cant recognise it, so I cant put or change music in it. Few computer without any installation is recognise it but my computers cant. I tried to download this sansa clip softwer from here but it sais their was some problem during installation. I tried it 5 times , so t could work but it doesn not. So what can I do?