oops it was so late at night i gave you completely the wrong solution, sorry illippinno.
what i should have said was change your memory frequency "by SPD" to a percentage that equals 166Mhz for the "resulting frequency". in your case the percentage would be greater than 100% and you may have to set an option to let you use "user defined" settings be fore you can change this.
and yes Lostman is incorrect. pc2700 runs at 333Mhz and pc3200 runs at 400Mhz. these are actual memory speeds after multiplied by the double data rate (2x).