This is driving me nuts.

I have an N95-3 and a bluetooth headset (the HS500).

When I press the button on the headset the phone goes into 'voice dialing' mode - it waits for me to say a name and then tries to match it to the names in my address book.

The problem is that the button on the headset can easily get pressed by mistake (like when it is in my pocket) and then the phone matches the scratchy noises it picks up with a random entry in my phone book and calls that person. My phone's keypad is locked but there is no way to similarly lock my headset.

So, is there any way to disable this feature on the phone. Or any other way to stop it from doing this?

Thanks.