Filemanager doesn't work in TinyMCE insert image

Revolution 2.1.1 - installed TinyMCE
When I click Insert Image button in editor and try to browse files - filemanager window opens, I browse folder on the left pane, but nothing changes on the right pane - means only files in the root folder are listed.

on another site with revo 2.0.3 works fine

Thanks.

found solution here http://modxcms.com/forums/index.php/topic,63523.msg369305.html#msg369305