It looks like the website don't have read permission on "bin" folder,  try to assign a read permission of "everyone" to the "bin" folder

Thanks Owen, but this dint helped me much i have even tried to gave full rights to ever one on bin folder but still same issue.

Any further help would be much appritiated.

Thanks.

This has happened to me before when I have accidentally had javascript turned off. I would probably get firebug started and see if it is a javascript error that is stopping the trees from loading or maybe try fiddler to see if some information web service calls aren't getting answered.

Thanks Seth, Javascript is ON and frebug is not giving any errors, i have checked the JSON response and its returning empty.

The reason of ^^^ is it got an error when umbraco try to get all require type info by reflector.

You can write some sample reflector code to have a test, i think you will get an error

yes i might need to debug the code to get the error response, but i am not sure why it happened as i havent made any change to umbraco admin code / DB.

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