Help with Voice Dialing!

I have a Blackberry Curve and the voice dialing feature activates itself on its own. For example I can sit at my desk and then look over and my screen is showing the "Say a name" screen for voice dialing. It occurs when I try to open or reply to a text. VERY ANNOYING! :mad:

My quick key on the blackberry I changed right away (like as soon as I got it last year) to keyboard lock and the other side is for photos.

Is there anyway to DELETE voice dialing from my phone? I never use the feature and it will not be missed. Any suggestions are greatly appreciated.

Thank you!
A very frustrated Blackberry user.