SanDisk Sansa c240 MP3 Player "fuze drivers side power window" Questions

...side a list of the 5 default songs that are already in a folder called 'Music' (there were other folders like 'Record', 'Photo' etc)... so I tried to upload the songs under that 'Music' folder.. but ...

...Fuze™ MP3 Player: Laptop recognizes device but exlamation mark shows in device manager, no driver found on installation CD to crrect the problem. Check your computer specs to see if those USB ports ...