There are 2 important things :

1. How much is your MONTHLY SALARY?

Because there is salary bracket to be able to get family visa for your wife and kids.

I am not so sure, but I think you should earn 8,000 QR monthly to be able to get family visa.

2. What is the PROFESSION indicated in your visa?

If the profession on your visa is BLUE COLLAR JOB, then they will not allow you to get family visa, even if your salary is covered by the bracket. Your profession should be WHITE COLLAR JOB.