He has a week 37 2003 not 2004 so
It's expected since:
• Some 2003 weeks 35 to 43 are locked, some are not
http://www.ocforums.com/showthread.php?t=244237
Although new desktop Bartons are multiplier locked, they tend to overclock further so, if you have quality RAM that can go way into 200s FSB, even if the CPU is locked, you're better off because the resulting speed tends to be higher,
MHz speed = [FSB] x multiplier
if you have 2003 unlocked Barton capable of 2.3 GHz, that's not better than, say, 2004 locked 2500+ Barton capable of 2.4 GHz, if, that's
if you have RAM and mobo capable of going to 218 FSB so that
218 x locked 11 = 2.4 GHz
is better than
whichever combination of FSB x unlocked multiplier to get = 2.3 GHz