Add a fillet between two surfaces

Good afternooon every body.

This is the first time i post on the forum.

I am trying to add a fillet at the jonction of two surface and i not able to do it.

I join a portion of my part.

On the Jpeg i show in blue where i need to have a fillet of 3 mm.

If any body have a solution how to do it or a clue this will be apreciate.

I am still waiting an answer from my reseller for more than a week.

Thanks in advance.

SolidworksSurfacing