NTRealm works in WLS 6.0 but not 6.1sp2

[Greg]

I'm trying to setup a NTRealm in 6.1sp2 in the same manner as an NTRealm in WLS
6.0 (on the same system). It's not working. Does anyone know what has changed,
if anything in 6.1??? I double-checked everything to this point.

[Greg]

Here is the startup error:
####<Mar 14, 2002 11:21:45 AM EST> <Info> <Logging> <uawtapdb1> <admin_server>
<main> <> <> <000000> <FileLogger Opened.>
####<Mar 14, 2002 11:21:47 AM EST> <Emergency> <Server> <uawtapdb1> <admin_server>
<main> <> <> <000000> <Unable to initialize the server: 'Fatal initialization
exception
Throwable: java.lang.IllegalAccessError: java.lang.SecurityException: Unable to
open process token -- bad domain name
java.lang.IllegalAccessError: java.lang.SecurityException: Unable to open process
token -- bad domain name
at weblogic.security.acl.Realm.getRealm(Realm.java:91)
at weblogic.security.acl.Realm.getRealm(Realm.java:62)
at weblogic.security.SecurityService.initializeRealm(SecurityService.java:258)
at weblogic.security.SecurityService.initialize(SecurityService.java:115)
at weblogic.t3.srvr.T3Srvr.initialize(T3Srvr.java:402)
at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:202)
at weblogic.Server.main(Server.java:35)
'>

Here is config.xml entry for the NTRealm:

<NTRealm Name="TestNTRealm" PrimaryDomain="."/>

Any help would be appreciated!