Bluetooth Pairing & Forgetting devices?

[markprior]

i managed to get my other phone paired and its working ive now got a replacement and cant get the X5 to go into pairing mode, how do i get it to forget any previous devices as i think this might be the problem.

the phone its paired with is a iphone4s and i need it to pair with a different (work) iphone 4s

its an 03 3.0d sport with nav

thanks

i have tried usual pairing method, hold button under arm rest for 1-2 secs, turn key to position 2 still holding for 2-4 secs then realeasing.