Fiesta Mk7 'bluetooth Handsfree' And Mode Button Problem

[BHeart]

The 'mode button' on the left stalk of my car has always worked faultlessly whenever I used it to make a handsfree call or answer an incoming call but this afternoon when I was on the way home from work, I had a call come in and I pressed the mode button once but, instead of answering the call, the system went into the making a call mode? I.e. When you need to say "Phone" etc.

A few months ago I updated to the latest software and up until now, my previous iPhone 4 with iOS6 was working fine and the mode button was working as it should do so, I don't understand why this is happening now.

I've recently updated to the iPhone 5 and successfully paired it to my car and I've been able to make calls from the car using the mode button but as stated, the mode button does not now answer the call.

Any help would be appreciated.

Regards, BHeart