you should change the private plurks, languages and options setting which is just under your name of dialog box

you can set who can see this plurk,

the whole world, only my friends or other, you can type the group name on the box next by only if you want to say to the group member

Or, you can type the specific name of the person you want to talk with

then that's good

do i just tpye in the group name like "BSVOTE"?

Correct!

but they say "stack overflow at line 2" what does this mena

who said? how did it pop up?

don't ask me..ask plurk.com

第二行栈溢出

so the resolution is???

真复杂 当学英语了