Can't Open X Display thru wireless AP/Router??

[fwelland]

Set up
-FC3 Laptop hooked to my home LAN via wireless.

-Wireless AP is actually a router (4-1 wireless G router) - but not using the
'WAN' side - it is hooked to my LAN from a 1 of the LAN ports to my main
wired router.

-Frankenstein desktop dualie running FC3 plugged into LAN port of main
wired router.

Problem:
I can ssh fine, both directions, betweens these two boxes. However I can't set my display on the desktop to point to my laptop - and have the XWindow display on my laptop. I also can't set my display to my desktop and display an Xprogram from my laptop to desktop. (I could do all of this b4 I went wireless a while ago)

Yes I have done "xhost + " on my laptop and I have set my display env var on desktop to point to my laptop (and used -dispaly on stuff like xclock). I can ping/ssh both ways..

Where do I start looking? My guess is the 'AP/router' - but what specifically?

[fwelland]

in /etc/X11/gdm I had to DisallowTCP=false

It is true by default for security reasons.