Router setup with iptv

Hi!
I have a small problem. I cant get the m3u link to load in simpleclient. It is something about my router settings i think.
This is my setup:
Fiber modem to asus rt-n66u by wan. To the router i have 3 computers connected by wifi and have enable windows sharefolder so i can watch my movies on the different computers.
The problem i have is that when im in router mode on my router, it blocks the m3u stream somehow.
If i switch router to AP the stream is passed trough but my folder sharing is gone.
I would like to stream the m3u and still have my folders sharing intact so i can use my Kodi to watch m3u and movies without any hustle.
So my question is, what is the right setup to get this to work?
/macki_b