|"my OS is XP-Black edition rebirth version 7"|
Admitting that you're running a pirated copy of Windows can get your post deleted.
"and my CPU has memory shared??? what does it do???"
The CPU is the processor....yours runs at 1.7GHz. Don't refer to your computer as a CPU. The shared memory is for the onboard graphics.
"my MOBO built-in sound speaker,line in and microphone is not working"
Probably becuase you didn't install the audio drivers. Remove the soundcard & see if you can get the onboard audio working, then install a PCI video card.