Question Reguarding Reciever Freezing?

[KHJ0728]

For the past 3 weeks my receiver has frozen at 9:00 P.M. on Monday Night. I have attempted to Record "24" on Tuner 1, Monday Night Raw on Tuner 2, and "Two and a Half Men" on OTA. Any reason why other than maybe a faulty reciever that i would have this same problem every Monday. It didnt start until i started trying to Record OTA alongside but i thought that is what it was there for. Any thoughts?