The BEFSR41 is just an ethernet router. No wireless. It's in the same "family" of boards as the BEFW11S4, but uses a different chipset. Won't work.
See John's posting for the exact URL.
The idea was to teach you how to search a newsgroup *BEFORE* asking. The trick is to pick the correct buzzwords, which incidentally took me several tries. You use Google Groups to search usenet news, not the general Google search of the entire internet.
I suggest you bookmark this page as it's a bit clumsy to navigate to from the Google home page.
- In the "Group" box, insert "alt.internet.wireless" without the quotes.
- In the "Find messages with all the words", insert "BEFW11S4 lost settings" without the quotes.