PPTP VPN not established

I am struggling with pptp VPN from couple of days.
My connection worked before updating firmware.
Mikrotik RB951-2n v6.47 and also older didn’t work too.
When trying add port on Firewall->Service Port → PPTP it highlighted on red.
Log says: TCP connection establish from <ip_Address> but in I am not in active connection.
I add rules in Filter:

add action=accept chain=input comment="Allow PPTP connections" dst-port=1723 protocol=tcp
add action=accept chain=input comment="Allow GRE"  protocol=gre

I receive both of them in packets.
What else should I check?