error with thread.hpp

From: thrashmodule (thrashmodule_at_[hidden])
Date: 2002-01-19 04:41:23

I got this message:

c:\boost_1_26_0\boost\thread\thread.hpp(17) : fatal error C1189: 
#error :    Thread support is unavailable!

I use VC++ on Win98 so now what??????????