Show them your Qatar Business Visa.
Do u have UAE Residence Visa (AQAMA)
If yes, u only need your passport with AQAMA.
Designation should be:
1) UAE investor visa
2) UAE Director visa
3) General Manager / Marketing /Sales Manager / Accountant visa etc.

Others wont get on arrival visa.
Also your Visa/Debt card, as there is QR 100/- charges (Cash are not allowed)