disconnected error in link to WordPress after several changes among servers

I cannot log in the websites WordPress !
After several whole changes of the contents in a test server and an open server,
I found out that I din’t know how I used sever’s function menus, before I know
there are 2 different ways in uploading website data when from the test server to the open sever, and from the open one to the test one.
But I don’t,originally,I can’t fix this disconnection with WordPress with unexpected happening complex. Please, host! and connect in this website my computers with database WordPress.

Thank You!!

The page I need help with: [log in to see the link]