My Mp3 wont play certain songs

you need to check the format the songs are in, try putting them in mp3 format

Run the Sansa Recovery Tool and just start over from scratch. Only use songs that are in mp3 format if you don't want grief later.

The songs are in the wrong format - they need to be stripped of their DRM license (illegal) or converted to mp3 format.  The best, most legal way to do this is to redownload the songs as an Mp3 file, or re-rip your CD's in Windows Media Player in Mp3 format.
these problems occur because the user is trying to download a song format that the player does not recognize. Every music file is in a certain format. The most common music file formats are Mp3, WMA, AAC (iTunes), WAV, RA, etc.  In addition, every file format type is in a certain bitrate, size, etc.  By far the most common issue is that the music file contains a license or copyright (especially with WMA or AAC file formats).  Each Mp3 player only recognizes a certain number of these formats. Every Mp3 Player is different. You will have to check your Mp3 player’s product specifications (specs) or user’s manual to find out which formats your particular Mp3 player recognizes. When you try to download or sync the wrong file format, you will get one of the errors that I mentioned above.   If you want to know what file type you have, then you must find the location of the individual music file on your computer, right click the title of the song, and select the option “Properties” from the menu.
Mp3 player product documentation is not straightforward.  If a player supports only non-protected WMA files, it will merely say that it supports WMA – it will not tell which type of WMA it supports.  A player that supports DRM-protected WMA’s will usually indicate such on the box (usually with a Windows Plays For Sure logo – which is actually an ironic misnomer).  DRM stands for Digital Rights Management, and it is a type of licensing system for WMA files.  It is used extensively by mp3 player music services such as Bearshare, LeapFrog, Napster, and others.  Not all DRM licenses are created equal – there are licenses with “play rights,” burn rights,” and “transfer rights.”  Play rights mean that you can only play the song on your PC – it will play fine on your computer, but it will not play in your mp3 player even though it appears to transfer.  Burn rights mean that the song can be burned to CD.  Transfer rights mean that the song can be transferred onto an mp3 player that supports DRM-protected files.  Then, there are unlimited licenses and limited licenses.  Limited licenses only allow you to play a song for a certain length of time. You would have to pay extra to continue using the song after that trial period is over – the time length ranges from a few days to several months or longer.

-Tha Mp3 Doctor

the Walmart songs should be usable, but the old Rhapsody songs will have to be reloaded, or your Rhapsody sub will have to be renewed.

get a refund. It needs to be relicened on the net

Try this: disconnect the player from the computer, hold in the volume + button, and reconnect the player to the computer while holding the volume + button in. Keep holding the volume + button for an additional 5-50 seconds. Windows should eventually go into recovery mode and revive the player- it will pop up a window that says Found New Hardware Wizard.
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Download the Sansa Recovery Tool from the Sansa website.
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.
Firmware Upgrade- Erases Everything: Get the latest firmware upgrade from Sansa - it updates the firmware and erases every song in the player all at once. Note: this method doesn't work if already have the latest firmware. Go to this website and click "Firmware Updater" to find out: http://www.sandisk.com/Retail/DriverDownloads.aspx
or
http://www.sandisk.com/DriverDownload/driverList.asp
-Tha Mp3 Doctor

The wal-mart music songs do not work on devices that require "subscription" licenses. One option is to burn the music to a cd, then copy it back to your computer to remove the licenses, to allow them to work. But I think that may be illegal. ;0)

Well, I may have a solution. Some music websites or "free" mp3 websites put a type of license or protection thing on the files that you download so that when you try to listen to them, you can only use certin software/music players and also make it so you cannot use any of the files on your mp3 player/iPod. I tried a place called emusic.com and they say you get 20, or so, free downloads BUT you can only use their music player for them. And the funny thing is, they have avertisements in about half of the packages of new mp3 players in the market. Try looking at their policy or license on the website to see if you can put the songs on your mp3 player. Good luck, and have a nice day.

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