Drobo

Error on DroboAdmin

I am getting an error when I access DroboAdmin
http://drobo-fs:8080/droboadmin/
The error is when I click on “Install DroboApps” I get this message :

Warning: file(http://www.drobo.com/droboapps/feed/textfs.php) [function.file]: failed to open stream: Network is unreachable in /mnt/DroboFS/Shares/DroboApps/droboadmin/www/index.php on line 301

Also When I click on “Upgrade DroboApps” I get the following message:

Warning: file(http://www.drobo.com/droboapps/feed/textfs.php) [function.file]: failed to open stream: Network is unreachable in /mnt/DroboFS/Shares/DroboApps/droboadmin/www/index.php on line 224

The error does not happend when I click on “Configure DroboApps” or “Uninstall DroboApps”
Any help appreciated.