401 upload error for minishop gallery on firefox ?

I have been using minishop2 plugin for product management. When I try to upload gallery for the product I always get 401 upload error message.

This works very good in chrome and IE. But can't get it to work on the Firefox. I always get UPLOAD ERROR. and nothing happens.

Has anyone gone through this problem?

This problem also exists in the demo mentioned in documentation of minishop plugin for modx.

http://modx-minishop.ru/manager/?a=88, login: demo, password: demo. when trying to upload gallery image for the products, I get upload error in firefox.

Any help?

Problem in browser permissions for Flash.

Ya, its seems to be the browswer premission problems. I haven't been able to solve it.

Have you tried the latest beta version? The upload manager has been completely replaced.

http://bezumkin.ru/sections/components/1656/
http://bezumkin.ru/sections/components/1673/