Packets not being filtered

Hello all

I am trying to block Facebook on a MikroTik. I am currently blocking Facebook on a site and it is working on WinBox v6.36.3 on RB750G, but it does not seem to be working on the my other router at a offsite WinBox v6.42.5 RB750Gr3.

The Filter Rule that I am using is:
Chain=Forward
Src. Address= 192.168.240.0/24
Layer7 Protocol= Facebook
Action=Drop

Layer7 Protocol:
Name=Facebook
Regexp= ^..+.(facebook.com|facebook.net|fbcdn.com|fbsbx.com|fbcdn.net|fb.com|tfbnw.net).*$

I have also tried= ^.+(facebook.com).*$

P.S The rules are at the very top of the filter “except for Special dummy rule to show fasttrack counters”

Assistance would be greatly appreciated.