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symantec 10.1 and windows 2003 server 64BIT

Created: 06 Dec 2007 • Updated: 02 Mar 2009
I've a problem with symantec antivirus 10.1.
if this isn't the right forum,Plz forward me to the right one.
my problem is the i've install the main server on Windows 2003 STD (not 64 bit).
i've installed the SAV on windows 2003 ENT 64BIT.i've a problem that the main server doesn't update the 64BIT.
can the main server update the 64BIT when he himself not 64BIT?
the virus definition the he download, are they support the 64BIT SAV as well?
if so why he doesn't update my 64BIT?