Follow the procedure.

Go to the Gharrafa immigration centre, with forms completed, passport copy, your RP, your husbands RP copy and submit it to them, they will say, you have to take special permission from general,

General sits on the first floor of the building no. 1 ( you can ask anyone) go and submit the forms there, they may ask you to comeback tomorrow morning,

So go next day morning, if it is already signed they will give u the signed documents, otehrwise they will ask you to meet the officer go and meet the officer and explain your problems and requirement of your parents here in Doha, he is good he will signs the documents (90% chances he will sign) and then go back submit the forms in immigration counter and within couple of days your visa will be ready.

This is the procedure many of the follows - Good luck.