Hi Jaclyn,
I fixed it.
After discussing with kersten about this issue he gaves me some great advices, and foud that my profiling dont tag the column because of the sampling algorithm it uses.
To be more clear, the profiler will relay on a configuration file that fixes some key values (NO_OF_ROWS and PERCENTAGE_REQUIRED=80). So this mean that it will look for NO_OF_ROWS that defaults to 100 insied the columns to profile and should find out opf theme at least 80% that matches the regexp defined.
I finally updates my tables to get 100 recored and used this regexp "\b[[a-zA-Z0-9]]([-_.]?[[a-zA-Z0-9]])*@[[a-zA-Z0-9]]([-.]?[[a-zA-Z0-9]])*\.([a-z]{2,4})\b" and voilà things works magically.
Regards,
Mouhssine