Wireless Security Issues

I am having a problem getting my clients to connect to the server
using IAS.

My setup:

Server 2003 Enterprise
lan1 - cable modem
lan2 - linksys wireless router wrt54gs v5

Clients - Windows Vista Home

I have set this up before however the only difference was I was using
win XP clients. So far I cant get any client to connect or
authenticate with the server there are a few error messages I get.
Event Type: Error
Event Source: IAS
Event Category: None
Event ID: 3
Date: 7/25/2007
Time: 1:37:29 AM
User: N/A
Computer: STONESERVER
Description:
Access request for user APARTMENT.LOCAL\(E-Mail Removed) was
discarded.
Fully-Qualified-User-Name = APARTMENT.LOCAL\(E-Mail Removed)
NAS-IP-Address = 10.10.1.2
NAS-Identifier = 0016b6d77e9b
Called-Station-Identifier = 0016b6d77e9b
Calling-Station-Identifier = 00146cca8765
Client-Friendly-Name = WLAN
Client-IP-Address = 10.10.1.2
NAS-Port-Type = Wireless - IEEE 802.11
NAS-Port = 40
Proxy-Policy-Name = Use Windows authentication for all users
Authentication-Provider = Windows
Authentication-Server = <undetermined>
Reason-Code = 5
Reason = The user account domain cannot be accessed.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 00 00 00 00 ....


along with this one

Event Type: Error
Event Source: IAS
Event Category: None
Event ID: 5052
Date: 7/25/2007
Time: 1:37:22 AM
User: N/A
Computer: STONESERVER
Description:
There is no domain controller available for domain APARTMENT.LOCAL.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.




I have already checked and registered IAS with AD. I am not exactly an
expert on this and could use any suggestions. I am wondering if its a
problem with vista or maybe something on that end is different than
XP, however I dont see a whole lot of options when configuring the
wireless.
I have heard that IAS can be touchy when connecting so i tried user +
password + doman as well as user@domain and from what i have searched
I cant really find a good article that shows how to set this up from
scratch, maybe I am missing something. All this is is a basic 1 server
and a few client setup I just want to beef up the security by adding
domain authentication and eventualy certificates (service is already
installed)

One thing I am not sure of is in the linksys setup for wireless
security there are many options that include a radius server WPA
Enterprise, WPA2 Enterprise as well as RADIUS, another question is
which one should I be useing, the RADIUS option has a WEP key in it as
well but I dont have any option to use it either in the server setup
nor the clients. Can someone enlightn me?

Any help would be appreciated thanks.