sed help!

From: Bowser325 (mccallaREMOVE!_at_thepacketlounge.org)
Date: 08/19/04 

Date: Thu, 19 Aug 2004 17:03:08 -0400

I'm trying to edit multiple zone files @ once using sed, but when I run the
below command to replace the numeric string that is on the same line as
string "Serial" I get each digit in the numeric string being replaced by
the 10 digit replacement string.

sed /Serial/s/\[0-9]\/1234567890/g filename

Any help would be appreciated...
Thanks.
Aaron.