hi, i have booled a sqaure into a sqaure, and since that time the edges, that are selected ( see below) are not able to be fillet-ed

You may have had a value to large for the radius because you had both edges filleting at the same time. I used .016 and it worked fine. When filleting use the cursor to go to the smallest edges and pick a corner point and a point down a vertical edge to get a good number for your fillet.

thank you very much,, i am almost in love with this application, man i ve never ssen a so clear interface,,, i usually work with cinema 4d, and thtat has in my opiniion the best workflow,,but moi kicks ass, thats awesome

thank you grendel ;) thank you very much