That may not be a Roku issue. I could be an issue with the cable provider. It could be an issue with the apps, since many apps are related and share authentication (think A&E networks, NBC networks, etc).
If you provided specifics about what isn't working (avoid "all" or other non-specific words) perhaps we can help.
DBDukes http://www.dbdukes.com/ Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution." Note: I am not a Roku employee.