My sansa wont sync songs.

You have 2 ways to transfer your songs from your computer to your sansa clip:
1. Plug sansa clip to computer, double click on "Sansa Clip ...GB", double click on "Internal Memory", you will see the file "Music", copy your songs and paste them into Music file of the device.
2. Using Windows Media Player: open windows media player, plug sansa clip into computer, click on Sync tab, select songs that you want to sync, drag and drop song selected into "Sync list" on the right side of the windows media player (you should update wmp11), then click on button Start Sync.

Good luck

Tried this Sansa site for support ?
http://www.sansa.com/support/sansa_c200/troubleshooting

Try using some other player...realplayer will do..
try to sync with real player...

Check My Computer. If the PC recognises the Sansa player then simply add the songs by dragging the files into the player's icon on My Computer. Sometimes this kick starts the built in software included on the mp3 player.

Try to reboot your PC. Leave mp3 player off when start Sync (if button lights up this time).

Use Windows Media Player to delete the songs. Connect the Sansa to the computer, open Windows Media Player, and go to the Sync tab -if it asks you if you want to sync the songs automatically, tell it "no." Find the songs on your player in the Sync tab and left-click a song that you don't want. Hit delete on your computer's keyboard.

-Tha Mp3 Doctor

Use Windows Media Player to delete the songs. Connect the Sansa to the computer, open Windows Media Player, and go to the Sync tab -if it asks you if you want to sync the songs automatically, tell it "no." Find the songs on your player in the Sync tab and left-click a song that you don't want. Hit delete on your computer's keyboard.

-Tha Mp3 Doctor

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Use Windows Media Player to delete the songs. Connect the Sansa to the computer, open Windows Media Player, and go to the Sync tab -if it asks you if you want to sync the songs automatically, tell it "no." Find the songs on your player in the Sync tab and left-click a song that you don't want. Hit delete on your computer's keyboard.

-Tha Mp3 Doctor

Well, one way of fixing this can be to watch the files sync to your mp3 player and when it starts syncing the unwanted files, just simply press "stop sync". I think i know what you are using and i had the same problem at first. you will make a sync list and click sync but after that list if finished, it will sync the rest of the songs from your computer also, you can just wait for your wanted sync list to be finished and as soon as it begins to sync the unwanted media, just press stop. this wont harm your computer or your mp3 player.

Delete from the Windows desktop if possible. Double click on My Computer. Double click on the icon of the Sansa. Go into the music folder and delete from there.

Or

Format - Erases Everything: Connect your Sansa player to the computer and open Windows Media Player. Click on the Sync tab. Pull down the drop down menu underneath the Sync tab by moving your cursor over the Sync tab and left clicking on the little black arrow underneath the Sync tab. Highlight "Sansa 1GB" (wording may vary slightly), and then select "Format." - this should erase everything.