I have been trying to sync my Oracle calendar with my iphone but have been

Here's what I've tried so far:
I downloaded the ToDoCal app on my phone and used the following URL for the
server setting:
I have also added (and triple-checked) my user name and password.  
When I attempt to sync the calendars, I get the following message: Sync
Failed- server database not found.  

I spent quite a bit of time down at the computer depot in regards to this
issue(very nice and helpful group!) but we were still unable to figure this

Any help or suggestions would be greatly appreciated!  Thanks!