Dear Reem,
may be because you enter the database from off campus please follow the below instruction and i will send your article by email:
The ZU Extranet provides off campus access to library databases.
Use the ZU Extranet to access library databases from anywhere off campus. Follow the steps below:
1. Be sure you have set up a Universal Password. You do this only once. (Note: This is only available on campus)
2. Go to the ZU Extranet web site (Note: This is only accessible from off-campus)
3. Enter your ZU ID and Universal Password and select AUH or DXB or External (see screenshot, above left)
4. Select "Library Databases" to access the library web site and databases as if you were on campus (see screenshot, above right)