Redirect working well but destination NAT not

RouterOS General
1 
/ip firewall nat
chain=dstnat action=redirect to-ports=80 protocol=tcp dst-port=80 packet-mark=G1
chain=srcnat action=src-nat to-addresses=[color=#800040]XX.XX.XX.XX[/color] protocol=tcp packet-mark=G1

if change first rule to :

chain=dstnat action=dst-nat to-addresses=173.194.40.50 to-ports=80 protocol=tcp dst-port=80 packet-mark=G1

Counting but not work! :open_mouth:

RouterOS 6.1 on X86