Bass and subwoofer not working in Windows 7 64 bit

Ok I may seem repeating the thing posted before by some guys but it's a real trouble for me.My system's specs are as;
Dell N-5110 Core i7-2630QM 2.0GHz
Windows 7 Ultimate 64 bit Service Pack 1
Ram 4 GB
When I plug in Creative SBS A320 Speaker System - 2.1 , I can hear sound but there is no bass at all with music playing.I tried many solutions/fixes but can't get rid of this annoying thing.I have installed Realtek High Definition Audio Driver and also have pre-installed Dell Audio by IDT.I checked the Bass Boost in Speakers=>Enhancements, Installed/Re-Installed drivers/ Checked pins.I really don't wanna mess up with my drivers again so decided to ask some reliable expert like you people.Speakers are perfect with other devices except for my Laptop.
Do I need any Audio Manager to install on my system?Can I solve my problem you know how empty it feels without Bass.
(By the way Like many others, My system speakers are also dead for no reason.Cant hear anything without external sound system/headphones)

Now that's the exact reason why I love you guys so much..Go and search other blogs and forums,you will see tons of solution with 'dos' and 'donts' filling all over in replies..But here I have seen many threads, No other than straightforward & sensible solutions..Thanks alot 'fireberd' ..My Sound looks fine with sound system now..(Will be back with my system's own audio problems soon but let's get some rest before.:) ) Thanks for helping out to the Illiterate' people like me all around the world.You people are web Heroes.. R.E.S.P.E.C.T

God Bless!!!