samba - Jul 2010 - Digitally encrypt or sign secure channel data

Hello!

Our security department recently implemented the Digital Signing settings on our
Windows 2003 domain controller.  I'm trying to set up a RHEL5 server to
simply act as a file server, although I'm able to join the domain
successfully, I'm getting errors when I attempt to access the RH server from
the Windows side.  The error I get is:

"Trust relationship between this workstation and the primary domain
failed"

Now googling this problem I've found several posts that indicated that I
need to disable the following:

Domain Member: Digitally encrypt or sign secure channel data (always)

The problem is, I cannot do that.  So, I'm hoping that there may be a work
around for this on the Samba side.

I have loaded the most recent version of Samba (3.5).

Thank you in advance for your help!