cannot receive netflow on my RTNA

Hello Experts

im trying to get netflow packets from my border internet router through my asa to a netflow collector on the inside network. im receiving hits on my access-list on my asa....but cannot

get netflow data.MY setup is HOST------ASA-----Router.I have enabled netflow on my router.Does only applying access list help?

My config is

access-list 101 extended permit tcp host 172.16.5.12 host 116.90.224.2 eq 2055.

Do i have to do the natting for this?

I am new to ASA pls help