My Linksys router will not talk to my Empeg. At all. It is the EFAH08W, and depending on the exact version, it may share a lot of the same hardware and software as your BEFSR41, and therefore the same issues.

http://empeg.comms.net/php/showflat.php?Cat=&Board=empeg_general&Number=51771&page=&view=&sb=&o=&vc=1