You need xCon. Just like Apple and jailbreak hackers, apps that offer entertainment content like directv, it's a cat and mouse game. Not sure of your situation but directv was recently updated (on January 13) and with each update they usually implement jailbreak detection codes. I'm not sure if you had the most recent version or not prior to the 6.1 jailbreak but either way xCon should do the trick. I'm not sure if its updated yet for the latest directv version or not but try it out. If its not working yet just wait, the developer is really good at updating that tweak.
On a side note, I think there's a companion package for con which prevents the App Store from updating a particular app so you don't run into this problem where the app won't work on a jailbroken device.
Edit: whoops looks like PaintheSkyGrey beat me to it. Grab the tweak from his beta repo. I don't use xCon or any apps that would require it so I was running off of memory. Good luck!