MashZone for iPad

Hi there, I'm trying to use MashZone for iPad. I've mailed myself the MashApp "Link to dashboard on Apple iPad" from my laptop, in order to ensure that I get the server name and address correct etc, however I continue to receive the error:

Server "http://my_servername:4080/" is unavailable or must be updated.

I've tried playing with the Server name/URL that I use, including the "/mashzone/app" after the TCP port, but nothing is working.

I've run out of troubleshooting options - any help apreciated!! :-)

Thanks

W