Nokia 6120 Data Transfer Problem

Hi All
I an trying to transfer all my contacts from Nokia 6630 to my new Nokia
6120, but the data transfer always produces various error messages without
transferring any data across. Both phones successfully connect via Bluetooth
and can receive business cards individually, but when I try to transfer the
entire phonebook, a message is sent from one phone to the other and then the
error message is displayed: 'error: cannot install'.
Any suggestions?
Many thanks.