what does this mean? (simple)

[Guest]

ni shenme shihou xue zhong wen?

[Amego]

Yoyo!

ni shenme shihou xue zhong wen?

你什麽時候學中文？　ｔｒａｄｉｔｉｏｎａｌ　ｃｈｉｎｅｓｅ　　
你什么时候学中文？　ｓｉｍｐｌｉｆｉｅｄ　ｃｈｉｎｅｓｅ

ni3 shen3 me4 shi2 hou4 xue2 zhong1 wen2? hanyu pinyin

你－ｙｏｕ
什麽時候－ｗｈｅｎ　ｌｉｔ：　ｗｈａｔ　ｔｉｍｅ，　ｗｈａｔ　ｐｅｒｉｏｄ
學－ｌｅａｒｎ
中文－Ｃｈｉｎｅｓｅ

Put it together, u'll get

When are you learning Chinese? or When will you be learning Chinese?

=p

[Si gao ti]

Maybe it is supposed to be

Ni shen me shi hou kaishi xue zhongwen

when did you start learning chinese?