Hacking "Comunication error"

[Blue]

I tried to start a local multiplayer with Mario Kart 7 from my 3DS to my sisters and I got "comunication error" when I tried to create a group but it works when she creates the group and I use download play. How would I get it to work so we both could use our games because I think there is more features when both games are used like both choosing a character instead of the download play person using shy guy. My console is on 11.0 a9lh luma and is a new 3ds and my sisters is and old xl on stock 11.0 with legit cia's installed.

 

[Deleted member 366698]

On your cfw console, which cia did you install?
I had that problem installing a cia from that iso site, that was fixed by installing one from nintendo's servers using funkeycia.
Try using freeshop to download mario kart 7 and play that way

 

[Blue]

On your cfw console, which cia did you install?
I had that problem installing a cia from that iso site, that was fixed by installing one from nintendo's servers using funkeycia.
Try using freeshop to download mario kart 7 and play that way

All my games are from freeshop exept some custom VC ones.