XenApp failure on iPhone/iPad

Hello-  

I am running a trial of Citrix XenApp 6.0 on a Windows 2008 R2 Server.  

I have installed Citrix Licensing Server, CSG, WI, and XenApp on this server.  

I'm able to access the apps and stuff from the Web interface, but not through receiver.  

When I try with the receiver on the ipad - I get the IIS7 default page
When I try with the receiver on the iphone (3G) - I get the error:  “Login Failed The address given did not provide a valid App list” on the receiver on my iphone.  

I think the two errors are symptoms of the same condition of being somehow misdirected.  

I also get those errors from both internal network and from internet.  

However, I can navigate to the web site (https://server.domain.com/citrix/xenapp) – and see the apps….  

Any ideas?  

Thank you very much for your help.