Why my family visa hold is getting rejected. I did...

We would like to inform you that if you are reside in UAE and want to bring your family , then your salary must not be less than 4000 or 3000 dirhams plus housing.
The required documents:
- Application with the fees payment.
- A certificate showing your salary if you are a governmental employee, or a certified contract for others.
- Bank statement for the last 3 months and for the new resident for one month.
- ID and a job card and lease contract.
- Certified marriage contract from your country, if you married in your country.
- Passports for everyone.
- Three photos for everyone.
- Medical examination report for everyone and children over 15 years from the approved clinic.
For your information, the application fees are 310 dirhams + printing 15 dirhams.
And the types of visit visas are:
Short visa (30 days) can be renewed as the same period
Long visa (90 days)