Ok so i started to get a XA 6.5 farm up and running for testing and i ran in to the following errors.
Event ID 30107
Site path: C:\inetpub\wwwroot\Citrix\PNAgent.
The Citrix servers reported that they are too busy to provide access to the selected resource. This message was reported from the XML Service at address http://CTXSERVER/scripts/wpnbr.dll [com.citrix.xml.NFuseProtocol.RequestAddress]. [Unique Log ID: db5427d9]
Event ID 10001
A usable server cannot be found on which to launch the application. Application: MyDesktop, Client: MYWORKSTATION (address: 10.10.10.10;;;), User DOMAIN. Check your worker group definitions and load balancing policies to verify appropriate servers are assigned for MyDesktop.
How i got round this.
1. Setup a worker containing my servers
2. Applied a load evaluator to the App.
3. Applied XA650W2K8R2X64001
4. Restarted XA server
Also make sure you don't have 1 in the following regkey.
_MACHINE\SYS TEM\CurrentC ontrolSet\Co ntrol\Termin al Server\fDe nyTSConnecti ons