PC is not detecting my scansa C250V2. -error- Refresh data base

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I had the exact same problem, and i found the solution! if everything he didnt said still doesnt work (though id suggest doing all of it to be sure) unplug your Fuze from your computer and go to "settings." then click "system settings" and scroll down to "USB mode." choose either MTP or MSP. your computer should recognize one of these.

What i would recommend you to do is to uninstall the device and reinstall it back...to uninstall it...assuming that you are running windows xp...click on start, right click on my computer and go to properties..you should have your system properties open then click under hardware then device manager...look for the sansa device..it usually located under portable device..if its not showing there i would recommend you to look for under disk drives and see if its there..right click on the device and click on uninstall...after you unintall it unplug your device from the computer....Then follow this link below to download the porting kit...http://www.microsoft.com/downloads/details.aspx?FamilyId=A2E73160-E862-4F19-BB26-C0CAFE798955&displaylang=en .Then check the mode of yuor device to make sure it sunder MTP not msc...To check the mode go under menu, settings and choose usb mode...After you check the mode open up your windows media player click on tools, options and click under privacy...clear the history and caches...after you finish you can plug the device on the back of the computer not the front then windows should recongnize it and it should work properly..if that doesnt solve the problems upgrade your windows media player to 11 even though you have done that already..and try to reconnect your device..make sure you have it connected on the back USB>>>

And if that doesnt work try to obtain the driver for your sandisk device go to http://www.sandisk.com/DriverDownload/index.asp and find the driver for your device..and then connecct the device on the back of your computer...it should work properly..if you are still having any problems..let me know..i would be more than happy to assist you..
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Computerrep