Having trouble trading Pokemon between my copy of Pokemon Black on my 3ds and melonDS

Hello!

I've been trying to trade a couple pokemon from melonds to my 3ds(pokemon black and white) with no luck.

I am using my phone's hotspot with open connection, I added both the "players" to the Pad Pal and I'm using the pkmnclassic dns on both my pc and my 3ds.

Can someone help me? Am I missing something?