My address book is empty

Bring up Palm Desktop. Make sure your Palm phone is synced up. Show the Address page, select all contacts (Ctrl-A), and export them with File, Export vCard. This puts all contact information into a single file as a sequence of vCards.

Bring up Windows Address Book. You can find this in Start, All Program, Accessories, Address Book.

Using Windows Explorer, drag the vCard file you created in step 1 to the Windows Address Book window. I had never used Windows Address Book, so it was empty. If yours isn't empty, you'll have to decide whether you want to merge your contacts.

When you drop the file, you'll get a window asking you to confirm the first contact. Press OK. Another window will come up for the second contact. Press OK until all windows are gone. It's easiest to hold down the Enter key.

Bring up iTunes with your iPhone plugged in. Go to your iPhone page, to the Info tab, and configure it to sync from Windows Address Book. Click Apply in the lower-right corner of the window.

Sync your iPhone. Verify that your contacts transferred over.

Tell iTunes to stop syncing with Windows Address Book, since you probably only wanted a one-way sync. Your contacts will be backed up anyway by iTunes, so the Address Book sync feature doesn't buy you much.

open your 'empty' address book and click on the MENU button (left of the rotater wheel) and select FILTER and UNCHECK anything that is checked there. All your addresses should reappear. It happened to me and I have no idea how it happened, but it was a relief to get them all back so easily. Hope that works.

have you tried going to the setup wizard. There under device setup just choose the Import Sim Card Contacts. Then it will run and you sim card contacts should be transfered to your phone. 

Are you sure another address book isn't hidden? You can view all apps to see if it shows up. If you click the menu button and show all or unhide. If that doesn't work try switching to another theme.

It usually happens when the phone is encrypted and address book is also encrypted with it.

use a blue tooth if it suports

That's easy just goto your address book
2.press the menu button
3.select filter
4.press the menu button again
5.and select uncheck filter'
thats should make your contacts reapear

that is just how it is