Ok, so what do you mean in your OP when you state "when I synch, nothing happens"?
Are you saying that the program stops? Or are you saying nothing shows up on the device?
If the program finishes the sync, but you aren't seeing anything in the Address Book on the device have you checked in the Address Book on the device to be sure that no FILTERS are set? (In the Address Book, press Menu and select Filter.)
Or since you have the data as an Excel file, you might try to import the data into Outlook and then use that to sync to the device.