Conditionnal plugin question

Hello,

I'd like to show, in my CB registration form, a text field, only if a particular value is chosen in a single select field.

I've downloaded and install CB conditional plugin.
created a single select field with 4 values : labo1, labo2, labo3, other
created a text field, hide it from my registration form and in the condionnal panel choose the following options :
- field conditionnal self (as conditionnal display), the title of my previously created single select field, is equal to (as operator), other (as value), show (as mode) and activated for the last 3 options.

In the registration form, when I selected other in the single select field, the conditionnal text field doesn't display

Can you help me?

Thanks

Please review browser error log for any fatal JS errors while viewing registration. Please ensure nothing else is hiding the field such as CBSubs or another conditional. Please test with default Joomla template. Joomla version? CB version? CB Conditional version?