problem connecting a wired and wireless system on a router

[Gaurav]

i have two systems, A and B:

system A:
Windows 2000 Pro
Connected wirelessly to the router

system B:
Windows XP Pro
Connected through an RJ-45 cable to the router

router:
set to dynamically assign IP addresses
no filters have been set up

want:
both system A and B to connect to the internet, and be able to talk to
each other, and use shared resources (printers, folders)

so far...
I've been able to succefully connect both systems to the internet, and
system B can ping system A, and explore it's shared folders.

problem:
system A cannot ping system B (or of course, see any shared
folders/printers)

would appreciate any help anyone can offer
G

PS: I also tried hooking up another laptop wirelessly through the same
router (connects fine to the internet), and again, the wired system
(system B) could ping it, but this also couldn't ping back the wired
system (system B) - could that provide a clue to the mystery?

 

[BobC]

i have two systems, A and B:

system A:
Windows 2000 Pro
Connected wirelessly to the router

system B:
Windows XP Pro
Connected through an RJ-45 cable to the router

router:
set to dynamically assign IP addresses
no filters have been set up

want:
both system A and B to connect to the internet, and be able to talk to
each other, and use shared resources (printers, folders)

so far...
I've been able to succefully connect both systems to the internet, and
system B can ping system A, and explore it's shared folders.

problem:
system A cannot ping system B (or of course, see any shared
folders/printers)

would appreciate any help anyone can offer
G

PS: I also tried hooking up another laptop wirelessly through the same
router (connects fine to the internet), and again, the wired system
(system B) could ping it, but this also couldn't ping back the wired
system (system B) - could that provide a clue to the mystery?

Ensure System B's XP built-in firewall is disabled.