The output in debug window read `ismine: true` when I typed in a checking code. Quoting a youtube guy:
1. Login to Particl Portal
2. top right click on "Logged in as
3. Scroll to the bottom and grab the `First Address`
4. Now go back to your wallet and load the debug window and type `validateaddress `
The output should read `ismine: true` - if it does not you have imported the wrong combination and you need to try again.