The page isn't redirecting properly

Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
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this sometimes happens when wordpress, or other programs that makes heavy use of mod rewrite is installed above DNPL directory wise. Wordpress for example includes a rule that requires a filename, like index.html Rules like that placed in a .htaccess file affect all directories beneath it...

so you browse to /DNPLinstalldir/index.php which redirects to /DNPLinstalldir/directory/ which because it apparently lacks a file name, is redirected to index.php

if you post the .htacces that is causing this I might be able to help, but you might want to try that apps forum first.. whichever one is supplying the conflicting rule.