XenApp - using the Citrix Online Plug in

[iSteve]

We have Citrix XenApp 5.5 running here, with apps published via a web page to users. I am looking at using the Citrix Online Plugin to make these apps available to users' start menu. I have made a new site with the PNagent, and can connect to the server using the online plug in, but receive this message when launching the plugin:

 

"The remote server failed to execute the application launch request"

 

I am stumped. I have looked on Citrix support and can't get any further. Does anyone here use XenApp that could suggest what might get this working?

 

Thanks.

[SLMHC]

When I see this error it usually means I've forgotten to assign the user any applications.