SX can't find VSTi any more!!!help please

[istyle]

hi
i use cubase sx2.2 for longtime and it went fine til today i wanna install some old VSTi to check old sounds
after the installation,SX open up with only 2-3of native VSTi ( b4 this i got ten of them
in C:/scope folder,because of scope is my audiocard ,it makes its own folder )
so how can i use my previous VSTis please ?
i think maybe there's a script to make it look into a new folder?
or some kind of window xp rollback into previous setting?
thnx

[cimoc]

Operation manual p.255 "plugin information window", and setting shared vst plugins folders.