not sure how to help, but is it something as simple as entering your phone number using a +61 prefix without the 0 part of the area code or mobile number?

e.g. +61 2 XXXX XXXX for a NSW number

       +61 4 XXXX XXXX for a mobile

The enter box might require you to not include spaces, in which case the above numbers would be entered as:

+612XXXXXXXX or +614XXXXXXXX

If the +61 is already in the enter box then obviously you only need your number minus the zero.