Hi Michael,
is your resolution still valid?
I am experiencing the same problem with the extended stored procs.
its a sql 2005 9.00.5296 SP4 running on a windows server 2003 r2 enterprise ediiton.
you had posted the comment 4 years ago , hence checking if the kb article still works?
i havent trried restarting the sql server , to see if it fixes the issue.
regards,
jickson sebastian