Whirlpool Beverage Center (WBC127BLS) - Won't cool...

Question

I purchased a Whirlpool Beverage Center (WBC127BLS) from Lowes.  
To my disappointment the minimum temperature setting is 43 degrees
Farenheit...not enough to make my beer cold enough.

Any suggestions on how I can make the refrigerator setting cooler?

Thanks a lot!