SL-75DRV2 Alarm???!!!

I just installed Hardware Monitor on my new system, and when i run it plays warnning sound. my temp1 20.1C and temp 2 43.

Help

system:
SL-75DRV2
XP-1800+
256Mb PC2100
60Gb Maxtor UIDE100
Voodoo 3 3000
DVD 16x Pioneer
16x10x40 Samsung CD-REW

and

I forgot to tell ya

i've got

Thermaltake DDR Memory Cooling
and
Thermaltake Volcano 7 Variable Fan Speed Control

and im rinning win me for now.

ps.
temperature2 increased to 45c in about 10 min, and temp1 is steady at 20 1C