Feature code problems / or pickup call problems

Thank you so much! Even after doing it, i could note that all my 4 phones plugged into my Grandstream ATA HT814 were not working. It was as lack of configuration at ATA setup page. Advanced Settings > Profile 1 (in my case, but it can be Profile2) > Enable Call Features (Changed it from yes to no.
When it is set to yes, ATA understands that any * command is a internal function.