Assuming you have an HRx series receiver or R22 for that matter, are you sure your directv receiver didn't revert back to RF remote control operation? Sometimes this occurs by default if dipcted so by a recent firmware update.
To check, simply press menu on your directv remote and go to parental controls and setup/system setup/remote/ir & rf and make sure IR is selected.
Hi mattwilcox11, if you are still having difficulty, you might want to try the troubleshooting outlined in this article.
The Slingbox Answers Forum Moderator Team