LoadingText disabled CascadingDropdown box

[X. Zhang]

I had two CascadingDropdown boxes in the web form. The second one was
populated depending on the selection of first one. I set LoadingText values
for both. After page loading, both of them were disabled. Fist of all, I had
no clue. Then I played around with them, and found as long as I commented out
LoadingText, everything works.

Any ideas? Thanks,

 

[X. Zhang]

I know what the problem is. PromptText has to be set with LoadingText. If
only LoadingText is set, after loading, the box is disabled.

Then why does it behave that way?