AutoWeb Define Tasker variable in API input variable with options

Api input variable with options you can define as follows in example below:

AFG:Afghanistan
ALA:Aland Islands
..
..
ZMB:Zambia
ZWE:Zimbabwe

I would like to define Tasker variable in already existing options to use it later e.g. in "For" Tasker action. So I add it in options as:

%country:Use %country variable in Tasker
AFG:Afghanistan
ALA:Aland Islands
..
..
ZMB:Zambia
ZWE:Zimbabwe

But AutoWeb is not saving such defined variable. Is it possible? Or special syntax has to be used here?

 

In editing parameter window by pressing ok... But actually it is working now. I don't know why it wasn't.
Have tested this kind of defining options, set it as variable in Tasker, before API action and its working pretty good