Why can't I add Epix to any of my devices?

Did you activate your device at the website shown below?

 

http://www.epixhd.com/devices/

Hi thank you for the reply.
Yes I did attempt to activate the service using that website.
When it prompts me to enter my user credentials for ATT I enter them in as I have when I activated HBO go and Showtime.
Instead of providing an access code to enter into my Roku, it just gives an ATT error message every time.
I know my username and password are correct as I used them to activate other Roku channels. I am also logged into my ATT account on another device that required me to verify my credentials.
I am also sure that I am subscribed to the EPIX channel as part of my ATT Uverse television service.
Thanks again.

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@EpixPlease wrote:

Instead of providing an access code to enter into my Roku, it just gives an ATT error message every time.

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Doesn't it work the opposite way?  You add the Epix Channel on your Roku and an access code is displayled which you enter on the web?

No it works the way I described.
You activate the channel on the Roku by inputting the code that the website provides. I have been unable to obtain that code since I can't get any further than the screen that requires my ATT username and password

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@EpixPlease wrote:
No it works the way I described.
You activate the channel on the Roku by inputting the code that the website provides. I have been unable to obtain that code since I can't get any further than the screen that requires my ATT username and password

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I have a Roku3.  That's not how it's working for me adding the Epix Channel.  Once I add the channel on my Roku, it displays an access code on my TV screen along with instructions to enter the code on the web.

You are right about that.
I just double checked and the code is displayed on my tv screen through the Roku, not the other way I around as I suggested earlier.
I have been messing with this all day and explaining the issue to multiple people and I mixed myself up.

Everything else I said though is accurate. Lol.

When I select epix on my Roku the epix channel opens up and I am able to see the available media. When I choose to watch a movie, say the newest Transformers, I am shown a screen with the link you mentioned earlier and and access code. When I go to that link on my phone it asks that I select a "device" from the drop down menu. I select "Roku" and I am redirected to a page that asks that I select a service provider from the drop down. I choose att uverse since that is the provider I use to watch epix with on my digital cable set top box.
After I choose ATT I am redirected to https://loginprodx.att.
This is as far as I can get. Once I enter my username and password the error screen is displayed.

RESOLVED!

I decided to try going to the link on my wife's work PC. Success.
Not why I could not activate on iPhone 6, iPad 2, or my Mac......
Must be an iOS/safari thing??
Anyway, thanks for your patience T Ranger. I appreciate your suggestions.