Visa-Saudi Employment

Dear Friends,
I have my qatar residence visa valid till next July-2015. I came here for a vacation and didn't go back. Recently i have been offered a job from saudi. They had send the visa to the agency for the visa stamping process.
My doubt is, will i face any problem in getting Visa stamping in my passport or iqama of saudi else my sponsor will face any problem in getting me a iqama for saudi. Also will i face any problem in the immigration of india or saudi at airport?
The visa of qatar which stamped on my passport will be expired on july thereafter no issue for get saudi Iqama?
If we not get back for qatar within 6 months the visa will be cancelled automatically?..
please advise me friends..