cant copy contacts to sim

I try to copy contacts from Nokia 6102i phone memory to the sim card so I can transfer to another phone but I get "115 contacts not copied" message. I try copying one at a time and get similar message. However if I transfer the card to another phone I am able to transfer to the card normally. If I return the card back to the phone I can copy info from the sim back to the phone but I can not copy from my Nokia to sim. Also If I use a new sim card from the new phone, I still can not copy to the new card. Why is this and how to remedy this situation?

Thanks