About inserting a math environment.

I don't like the feature of inserting an equation with a label:
It will insert a numbered default equation label as \label{esq.:1}, etc.  It 
is not good because the label gives the equation no meaning.  When there are 
a bunch of equations, it is troublesome for being referred.
If I manually change {esq.:1} to other label, I'm not sure whether the label 
is used or not (then I need check the duplication after I change the label).
How can I customize some variables such that when I insert an equation, it 
will still ask me for the label instead of inserting a default label? (At 
this step, the Emacs auto-completion will tell me which label is used.) 
Thanks.


BTW: I'm using AUCTeX 11.55
                         MikTeX 2.4
                         CVS Emacs 21.3.50.1
                         Windows XP.
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Best Regards,
Adam