Try looking up your account at www.yahoo.com/music. Sign in and verify that Yahoo sees your account as a valid To Go account. If it’s not seen as a To Go account there, then your Sansa Connect will think you don’t have a To Go account.
You can also try resetting your device back to factory default, and then signing into your Yahoo! account again. I’m hoping the re-authenticating will clear up any confusion with your Yahoo! account.
-ML
