Regex text comparison help

I cannot make text comparison to work with regex.
I set in "Two texts to compare: *

• [XX] in the first text field - the token I want to evaluate
• ^(?=\d*[1-9])\d+$ in the second text field as the regex pattern that the first shal match (only digits, at leat one different of 0)

The regex works in test, I ticked "Evaluate the second text as a regular expression."

What am I missing?

Thanks for help