Hello. I have a strange problem with my Sony Ericsson P1I: When i call somebody or somebody calls me, the name from my Contacts is not displayed, only the number. I can visualize ok my Contacts, but apparently the link between number an contact is not functional, i have no explanation. When i finalize the incomming call, i was asked if i want to add this number in Contacts, but i have already this contact in my phone.
Any suggestions? It is some sort of setting which is accidentally changed?
Thank you.

Problem solved. I've performed the procedure Update Service posted on Sony Ericsson's site. Before that, i've made a safety backup with PC Suite application.