Call Lists On Bluetooth Car Phone iPhone

Hi. I Have An Apple iPhone 3GS & I Got A New Citroen C4 Picasso Which has Built In Car Phone. The Problem Is. It Synced Ok, But After The Latest Update 4.3.1, I Have Lost The Use Of The Recent Call List So The Calls I Had Made & Received Are No Longer Available. I have Had The Car Checked & It Is OK. Is There Anyone Please Who Has Had The Same Happen To Them, Or Could Help Me Out With This Problem. many Thanks.
HP G70 Windows Vista Citroen C4 Picasso