Welcome the Technical Support section. Help us in assisting you by providing us with a concise and descriptive elaboration of your issues. Be specific and if possible, provide us with a step-by-step instruction in replicating your problem.
I'm very sorry but I've a little bit problems with understanding the problem, could you maybe elaborate it and explain what you mean by "disconnect automaticaly" ? Maybe some steps how we can replicate this problem on your site could be useful for proper debuging this issue.
It seems you've some kind of a redirection set on /administrator page, could you update your first post here with some proper url to back-end so I could ebug the problem properly?