My router has model number BEFSR11B stamped on the bottom of it. Linksys tech support act like I'm crazy - they've never heard of that model number. They kept trying to tell me it's a BEFSR11, and telling me to look underneath the router again and again. I promise you, it says BEFSR11B underneath. I'm trying to upgrade the firmware, and the BEFSR11 firmware is the closest thing available - but it doesn't work. Tech support tells me that the error message mean that I'm using firmware for a different model - which is true since mine says ...11B Any of you know anything about the BEFSR11B?