OT router help

[linuxmaillists at charter.net]

I have wired router A (linksys BEFSX41 latest firmware) and 
connected to it are computers A (FC6), B (FC6) & C (FC6) 
and wireless router B (linksys WRT54G latest firmware) with 
wireless computer D (WinXP Home) connecting to it.  I have 
googled with no luck finding my solution.  I can access the 
web interface on wired router A from computers A, B or C.  
What I can't figure out how to do is access the web 
interface of wireless router B from computers A, B or C.  I 
can access the web interface on router B with computer D.  
What I want is to be able to communicate across the two 
routers and the computers connected on each router.  Can 
some one point me in the right direction to resolve this?