Cisco ASA 5510 VPN not authenticating with Win 2k3 IAS.

I am not sure what is going wrong but I have setup IAS and configured the AAA settings on the ASA.  When I run the "test aaa-server..." from the CLI or from ASDM it passes and log entries are created in the System Event Log on the server running IAS.  When I use the LOCAL database for authentication it works fine but when I change the "authentication-server-group" from LOCAL to MyRADIUSGroup then it won't authenticate and nothing gets logged on the IAS server.  It seems that the request is not being sent from the ASA when I try to use it to authenticate my VPN sessions.

Here is the config on the ASA:

aaa-server MyRADIUSGroup protocol radius
aaa-server MyRADIUSGroup (inside) host 192.168.X.X
 key **************

group-policy RAVPN internal
group-policy RAVPN attributes
 dns-server value 192.168.X.X
 vpn-tunnel-protocol IPSec
 split-tunnel-policy tunnelspecified
 split-tunnel-network-list value RAVPNSplitTunnel
 default-domain value mydomain.local

tunnel-group RAVPN type remote-access
tunnel-group RAVPN general-attributes
 address-pool RAVPNPool
 default-group-policy RAVPN
 password-management
tunnel-group RAVPN ipsec-attributes
 pre-shared-key *

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