Need for Speed Racing Games

I'm using a Sound blaster Audigy 4 with some cambridge soundworks 5.1 speakers. The speakers are all set up and spaced perfectly. I get fantastic surround sound in games like Left4Dead and deadspace for instance, but i'm somewhat very disappointed in the surround sound in N4SS. The ambient menu music sounds great. I can hear the various sound effects wizzing round my head, but when racing, i can't hear cars coming up the side of me. I also can't hear any music unless i wear my stereo headphones which is on the same green plug via a splitter as the 5.1 system, so tell me. Is the game missing true 5.1, or is it my rig?

BTTT

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why not try without splitter and headphones ,and check the 5.1 is set rather than headphones in speaker options
also if i rem correctly there is a new driver out for Audigy cause last one the speaker settings didnt corrospnd with sound output
check for new driver ,rem to remover old one first


in fact why would u have 5.1 turned on and wear headphones ???????????? as well

new i read about it somewhere

http://www.tweakguides.com/

SoundBlaster Audigy Beta 2.18.0011
3 October 2009


Creative has released a Beta 2.18.0011 driver for the majority of the Audigy series under Windows XP, Vista and 7. The driver fixes a device error caused by enabling audio enhancements, as well as resolving an incorrect speaker configuration being shown in Audio Control Panel.