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Welcome to Radio Reference.
We don't know what you have tried already as far as setting it up... are you programming manually or by using Sentinel (or other software)? Are you scanning favorites lists or using the main database?
First things to do...
Update the database (page 6 in the owner's manual) and check to be sure the appropriate service types are turned on (page 12).
If using Sentinel and creating favorites lists, check the profile editor and be sure your favorites lists are set to "ON" for both download and monitor.
Be absolutely sure you have the latest version of the Sentinel Software from here:
Details in your questions are very important..... The more details in your posts, the more informative the answers will be.
There is an easier to read manual for the scanner and the Sentinel Software here: