Channels Do Not Work

I have the following channels installed:

CBS

MSNBC

CW

MTV

A&E

Spike

YouTube

NBC

For months now, I cannot get any of these channels to work on the web or on my Roku XD (2011) box. When I try to play the channel on the web:

- I click the channel (CBS for example)

- It gives me a list of shows and I choose one

- I choose Full Episodes

- I get the error "The media server responded with an error"

This happens with every channel, every show....everything.

If it makes a difference. I am running Windows 7x64, Plex 0.9.8.17.282-c844f09

I have zero problems playing my own media, just can't get the channels to work.

Thanks.