sounds  a lot like this issue: http://our.umbraco.org/forum/getting-started/installing-umbraco/4826-Admin-stopped-working

or this: http://our.umbraco.org/forum/using/ui-questions/6461-No-nodes-ind-the-backend

nothing solves it so far :/

* emptied ClientDependency folder

* recycled apppool

* checked permissions on windows/temp folder (gave full control for a while)

* no "blocked" files for as far as i can soo

* everything works fine on our staging environment

* front-end loads like a charm

* backend doesn't load nodes.

Try using firebug (or similar) to view the background requests being made for javascript and so on. One of them is probably throwing an exception that might give a bit more info on what the problem is.

no javascript errors on the page ?

one post and one get happens in the background each time i refresh the backend:

http://aviapartner.orbitone.com/umbraco/webservices/TreeClientService.asmx/GetInitAppTreeData - throws an error:

if i change the last / to a ? so (i believe) the url is formatted correctly:

http://aviapartner.orbitone.com/umbraco/webservices/TreeDataService.ashx?rnd=194da7e60f0a47fe8ec0e064a9151813&id=-1&contextMenu=true&isDialog=false&app=member&rnd2=97 returns a download that contains only two brackets [ ]

I checked the behaviour of TreeDataService.ashx on the working website, and there it returns a set of sections. after the move to the production environment it simply stopped returning data. Does anyone know what might be causing this?

GetInitAppTreeData's behaviour seems identical on a working copy of the website

only known difference is that the productionserver is 64bit, compared to the staging that is 32bit...

Did you figure this out?  I have same issue on the same pc after changing ip address and moving the folder to a different directory.  I spent a lot of hours trying to debug and basically gave up.  To fix I downloaded a new version of 4.5.1 then copied over my custom dll, usercontrols, media and then all worked again, still don't know the issue would love to what causes it.

I just performed a clean install on my server (4.5.1) and i'm getting identical issues (clean database, freshly downloaded files for umbraco, not a line of customisation...)

still no nodes in the backend.

Are you placing the files on a file share?

I have the same issue, and if I copy the files to a local drive it runs without probs :/

and its not very pratical to have them placed lokal, when using failover IIS :)

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