I've done this hundered of times in NX and SDRC but will not solve in Solidworks.
Trying to mate planer faces and the first two pairs will mate (coincident). When I try to mate the second pair I get an error saying the default (coincident) cannot solve. No matter which option I tried it will not mate. These are simple surfaces that are perpendicular to each other and I don't see any reason why the surfaces should not mate. I'm using Solidworks 2010 Premium.