Cached Credentials Problem

I encountered a strage problem with notebook Vista ultimate SP1 Asus

Lamborgini with fingerprints reader. I join to an active directory domain but

when working with cached credentials outside lan the notebook reboot itself

for 3 time before the desktop. The problem seems bound to security software

installed (Asus security protect manager) that stored encrypted password for

internet site and also windows logon with fingerprint authentication.

Only whe complete uninstall the logon problem disappears.

I repeat that the logon failed is only outside lan when using local cached

credentials, when attached to lan no problems.

I fount another topic with this problem :

http://www.vistax64.com/vista-account-administration/99411-unable-logon-very-interesting-problem.html.

Thanks

Michele