Losing video and audio in replay

[Chazflyz]

When watching my tracks, I lose the engine sounds of the aircraft and tracers as well. Anyone else experience this?

Settings are a mix of max and medium

my specs:
Windows 7 Pro x64 | eVGA nForce 780i | Intel Core 2 Quad Q9650 | Tuniq 120 CPU Cooler | Diamond ATI Radeon HD 5850 1GB | 8 GB Kingston DDR2 | 750GB Western Digital HDD | Cooler Master 850W PS | ASUS VE278Q 27" monitor | Bose Companion 3 | Razer Death Adder mouse | Natural Point Track IR 4 PRO | Saitek X52 Pro