Why can't I select image in Users folder to upload in user profile dotnetnuke?

Im add new attribute to user profile on dotnetnuke, the attribute is Avatar which type is Image. Everything is ok without changing its picture, I go to Manage Profile page, and select one of pictures I uploaded before in Users folder. But everytime I selected new image, the site is always reset to value! (Im 开发者_运维知识库using dotnetnuke 5.4) Does anybody know why ?

This is a bug in the user profiles in DotNetNuke. It is being addressed in the next release, 6.1, coming out later this fall.