[Register]-SOLVED- unable to set field via postHook -- help needed

Romain you're the best !
Too much time in php coding, too much time reading the same piece of code again and again and I miss this "$" instead of "&" ....

Ok, this problem is solved... Next one the checkboxes too let users choose one or 2 or 3 or 4 groups and assign them in the groups...

Thanks again for your fresh eye ^_^ (Bonne année)