Can't Turn-In Custom Challenges

Well you read the title so you get the idea. When I go to my challenges section on this website when I have completed the requirements for the custom challenge the option to turn-in the challenge remains dark and when I click on it nothing happens. I do know, however, that I can turn in custom challenges on the Halo Waypoint application on the xbox 360. So, I am basically sharing this website error or potentially account error that doesn’t allow me to turn in custom challenges on the web.
I experienced this problem on both windows xp and windows 7. The browsers I have used is the newest Firefox and IE 9.
Thanks in advance,

Looks like I’m not alone with this problem. See my similar forum post below. Still haven’t heard anything about why this is happening or what to do to fix it.

<mark>Unable to ‘TURN IN’ Custom Challenges</mark>