To be able to download files and see images and thumbnails in the
Images & Documents module, you should set the ISAPI mappings for .sflb
extensions on your IIS virtual directory. These should be set
automatically by the Sitefinity installer; however, you need to add
them manually if you have upgraded
using a patch or if you are
the site on another server.
Check out our troubleshooting section Troubleshooting
. If the problem persists, please let us know which version you are running.
I hope this helps.
the Telerik team
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