You will find in the UAE the regulator will only take ATC'ers from certain western countries eg. Sth.Afr, U.S, Canada, Britain, Ireland, Australia, NZ, Sweden, Norway and Denmark (will be others but just the ones off the top of the head). If on applying to Dubai Twr you were told your lisense was not recognised then I guess you are from a country not on that list. You could try the direct hire countrys out here like Qatar or Oman, as they may look at you in a different light. Good Luck. (by the way you have no chance of getting a job in Australia, as you will never get past the immigration rules as you need a full time job there to get residency, and you need to be a resident to be employed as an ATC, catch 22). Also if you don't mind dodging bullets, try Sth Africa.