hi der..i came here in qatar one month ago with a business visa..i know its difficult to pass by in the immigration there in the philippines but its up on your looks and answers (smart answers)..here are tips:

-if they ask u wat u will do in qatar u answer dat u will be meeting some of the managers of the company (which is your sponsor on your visa)
-if they ask u if u will work der say NO! tell dem u r currently working in a certain company in d philippines.
-if they ask u who will finance u der, tell them the company will shoulder all ur expenses, accommodation (hotel), food, transportation, etc..
-if they ask u when will u be coming back to the phils., tell dem u have a return ticket..(in a month right?!)
-finally, be sure u look good..as in well dress up like long sleeve and slacks..

note: ive been there b4 and i made it..for sure u will make it too..gud luck..daming trabaho d2 sa qatar..magaling tayo mg NOYPI..God bls