"Cannot connect to host:" - Visual Administrator Error

Dear Experts,
I am unable to login using Visual administrator and the portal is also down. When i try to login using VA it gives the error
Cannot connect to Host:XXX and Port:XXXX
and when i try to call the portal url i get a page cannot be displayed error is displayed.
I have tried the following solution with out any luck.
Cannot startup visual administrator due to UME logon client details changed
/thread/731863 [original link is broken]
Cannot startup visual administrator due to UME logon client details changed
Very urgent. Please help ASAP
Thank you
Thanu

Hi Tomas Gustafsson,
Thank for the reply,
dev_jcontrol
dev_server0
dev_dispatcher
-> Displays the line as programming code 
Hallo

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