Game loses connection on Ulkair Mission of Chaos rising

[Tomxj]

Heya, I'm playing online co-op with mate and we've battled our way to the Ulkair mission in Chaos Rising. Just after the Predator section, when the Blood ravens drop in and Ulkair addresses you through the intercom, the game locks up and my internet connection drops completely.

Anyone know why? Better still have a fix?

Thanks in Advance

[Terminus_Est]

up!

[Tomxj]

Got though it. I Verified my cache and then reduced the graphics to minimal (which seemed to make no difference what so ever). So go me! completed!