webmin configuration module, doesnt show UPGRADE WEBMIN

Hello

http://doxfer.webmin.com/Webmin/Webmin_Configuration

I install webmin in many machines, but I have on particular server does not show UPGRADE WEBMIN icon in webmin configuration menu, I m running the latest version 1.750, I also try download and instal webmin configuration module, but doesnt solve.

Any ideas?

Solved!!

I create one new user with all permissions, I delete default root user and login with my new user. is strange , but it works…