Anyone with any suggestion ???
I am not an expert and I don't know if I can help You here but it would be easier to test if You could paste all Your code as working sample (maybe without irrelevant detials).
Anyway from my expierience first thing to check is if listener method is called. It could be some problem with forms (like nested forms, domElementAttachment attrribute, I had problems when there were separate forms for popup and datatable), some validation errors (add rich:messages tag to check this one), JSF bug or environment issue .
If You use view scoped bean check out this one: