Cheers for your post - sorry that you're having issues with your Netflix via your V6 box
When you advise you get the splash screen - what screen is this exactly? Do you get a chance you log in? Do you get the same issue when trying to access via the Apps menu as well as via the Netflix channel (204)
Have you tried rebooting your box?
You can try signing out of the Netflix account, then rebooting the box and then once has loaded back up this should reset the Netflix and you can sign back in:
From the TiVo home screen, select Help & Settings.