hyper threading

im usin a Dell dimension 1100,pentium 4 2.8 ghz with HT technology and intel celeron,512mb ram (two 256 memory module,one is an original dell module,the other one is a kingston 256mb-512 MB (2 x 256 DDR-SDRAM ), in my owners manual is says that it supports hyper threading technology but in the device manager in the processor tab,it doesnt show two processors instead is shows only one.do i have to install any driver from dell?

if my PC supports dual channel mode,why doesnt it show dual channel mode in the system setup?

im confuse?? pls help me