I have two networks. One of which is your standard wired Ethernet network, the other is wireless N for use with my laptop. These two networks are on different subnets (i.e. XXX-XXX-1-XXX, and XXX-XXX-2-XXX, with 2 being the wireless part. Obviously I have two routers sharing a single cable modem, and the wireless router is connected through the wired router.

The reasoning behind this is so that if anyone is able to hack into the wireless network (highly doubtful, but always a possibility) they would not be able to get through to the meat of my systems on the Ethernet network.

Enter WHS.
The connector software is installed on my wireless laptop (as well as on the wired computers), but I cannot open either the WHS Console or the Shared Folders on the laptop. An error message pops up to the effect that: "This computer cannot connect to your home server... yada, yada, yada."
Where it gets really ODD is that if I right click on the WHS (green) icon in the tray And click "Backup Now..." the backup starts immediately. So, obviously the WHS machine (HP EX495) "sees" the laptop even though they are on different subnets, but the connection does not work the other way around. FWIW, the laptop is running Windows XP Pro SP3.

I can see the laptop from the server and know that these backups are being made and stored there, and I suppose that if I were to connect the laptop to a wired Ethernet port all would work as it should.
Since most of my serious work is done on my desktop machines this isn't really a "Big Deal", but I am very curious about why things should be this way, and if there is a fix for it. Obviously networking is not my strong suit, I'm a computer builder with more of a head for hardware than software.

Thanks in advance for any help/insight.

Here are Network Magic maps of both networks;