Halo 4 Campaign Reclaimer Mission Problem

Hello!
I am facing a big problem with Mission 5 " Reclaimer ", this mission not loading at all,., the other missions work perfectly without any problem
I checked my disc and i didn’t find any scratches or any problem with the disc,
The mission stopped loading ( working ) when the screen change to Halo 4 loading screen, it don’t even start the mission "( after the 5 second countdown the mission freezes )"
I don’t even think that the problem in my disc because i already finished the campaign offline and i want to finish the campaign missions online to complete my commendation…