Fingerprint Reader Problem W/ Latitude E6400 - Sleep Mode

I'm having a wierd problem with the fingerprint reader on my new Latitude E6400.  So far, the kind folks at Dell have not been able to identify the problem or resolve it, and they say they have not had it reported before.

The problem is that the fingerprint reader does not work when you come out of standby mode.  But it works with every other mode.  When you start up the computer from shut down, or restart it, or log off and then try to log in, a dialogue box pops up that asks you to press ctrl + alt + delete OR to scan your fingerprint.  When coming out of shut down, restart, or log off, I scan my fingerprint and everything works perfectly.  It logs me back onto my desktop.

But when I come out of standby (aka sleep) mode, I get the same dialogue box, but it will not read my fingerprint.  I have to press ctrl + alt + delete, and then a second box pops up that asks me to enter my password or to scan my fingerprint.  At this box, it will accept the fingerprint and log me onto my desktop.  Again, the first box says you can press ctrl + alt + delete OR scan your fingerprint -- just like when you are restarting, etc., but it will not scan the fingerprint no matter how many times I do it or how long I wait.

There is no option in the Embassy security management software that I can see that would cause this.  I tried updating the driver for the fingerprint scanner, but it could not find a more suitable driver.

I am wondering if anybody has experienced a similar problem.  

I'd also appreciate any suggestions on how to reolve this.  It seems to me that this is a problem with the interaction of the Embassy software and the Broadcom fingerprint reader, but I don't know.

P.S.  Dell suggested running a diagnostic on the fingerprint reader, but the fingerprint reader does not appear in the list of devices that you can run a diagnostic on.  I ran an express diagnostic, and nothing relevant turned up.

Thanks in advance for any help you can provide.