Unable to connect from Wireless to Wired device on same network - Westell a90

[drudini11]

I have DSL with a Westell a90 modem/router. I have 3 computers connected to the network. The main desktop PC is connected via ethernet to the westell a90. The other 2 laptops connect via wireless. I am able to ping between one wireless device and the other but neither can ping the wired machine and wired machine cannot ping the wireless ones. They are setup as part of same network same subnet.

Wired: 192.168.1.16   subnet 255.255.255.0

Wireless#1: 192.168.1.39 subnet 255.255.255.0

Wireless#2 192.168.1.41 subnet 255.255.255.0

Is there some setting that I need to enable/disable on the a90 to allow access from the wireless to the wired and vice versa? I basically want the ability to access the desktop from wireless via remote desktop. 

Thanks,

Bob

[dslr595148]

What software firewall is on those computers?