my guess is you dont have the correct references checked
I checked all that I could see that where acrobat related and get this result running your code.
Code:
Count 17
Address 1 Text Box of type text
Address 2 Text Box of type text
City Text Box of type text
Country Combo Box of type combobox
Driving License Check Box of type checkbox
Family Name Text Box of type text
Favourite Colour List Box of type combobox
Gender List Box of type combobox
Given Name Text Box of type text
Height Formatted Field of type text
House nr Text Box of type text
Language 1 Check Box of type checkbox
Language 2 Check Box of type checkbox
Language 3 Check Box of type checkbox
Language 4 Check Box of type checkbox
Language 5 Check Box of type checkbox
Postcode Text Box of type text
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