Fax viewer is empty

I uses Elastix 2.3 as a FAX machine,
in case of receiving a new fax it sent successfully to my email but my problem in elastix fax viewer, there is no fax appear !
I tried to copy the file /var/www/db/fax.db from another server to my machine and found FAXs appears well !

any idea to solve this problem?

You are in the FreePBX forum, you need to be in the elastix forum, we have none of that stuff you have problems with.