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ISA Server 2006 preventing Citrix Applications to run

We are having problems launching a Citrix application which has been provided to us by an external company.

We have a .ica which makes a direct connection to a server.  However, the ISA server which acts as our Web Proxy is failing to forward the traffic and we are receiving Failed Connection Attempt - Status Code 59 - an unexpected network error occurred.  The logs are only reporting HTTP traffic.

However, I have tried opening ports 1484 and 2598 on the ISA Firewall and we already have a rule in place to allow HTTP and HTTPS traffic.

This connects fine using an ADSL connection away from the ISA server.

Has anyone else come across similar problems or even better a solution which will allow us to get the traffic through the ISA Firewall?
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1 Solution
Citrix uses TCP 1494, not 1484 (if this was not just a typo from you).

Have you seen this: http://support.citrix.com/article/ctx482629

MarkBournAuthor Commented:
Oops, I meant TCP 1494, that'll be my fat fingers no longer working correctly.

That article, looks like it relates to an older version of ISA server (I have come across similar articles while browsing the web).  Also, the citrix server doesn't belong to us, so I cannot publish it.
Keith AlabasterEnterprise ArchitectCommented:
open the isa gui - select monitoring - logging - start query - try the access - what shows up in the log?
I assume you have the ISA2006 supportability pack and ISA2006 sp1 deployed?
MarkBournAuthor Commented:
We already had SP1 installed and I have now installed the supportability pack.  I have tried running the ica file again but still having that same problem.  

I have attached the logs from the ISA server.


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