I gotcha here tisossi is correct and it works quite simply
go here http://streamfree.tv/roku-channels/private/iptv-playlist-player-4885-thread.html and add it to your roku
Update your Roku and click on IPTV playlist player and You will see new playlist , click on that and add a name for your IPTV then just type in the URL that tifossi gave you , save it and exit.
Click on IPTV playlist player and you will see the playlist you added. Not all the channels will work so I just added the ones I watch to my favorites.
another option is http://streamfree.tv/roku-channels/private/super-stalker-4886-thread.html which I have yer to test but it should work as well.
If you have channelpear you can add them there as well and it will work on all your devices so I prefer it and I just added channels that I watch, if you need a hand PM me.

EDIT : I need to mention that channels not working is not tifossi's fault, it is the limitations of Roku as it only streams certain formats of video !