huh? the link i gave you is for you motherboard model bios. did you download it? there are 3 BIOS update for your motherboard.
JW-IG31-MKII BIOS V1.2 Fixed: E5200 CPU temperature high symptom; 1.1Mb 13 Mar, 2009
JW-IG31-MKII BIOS V1.1 fixed; Temperature displays incorrect in the CMOS setup; 1.2Mb 6 Nov, 2008
JW-IG31-MKII BIOS V1.0 It's the first launch BIOS; 1.2Mb 6 Nov, 2008