Unable to connect to Citrix XenApp 5.1 server

Unable to connect to one of the XenApp 5.1 servers as it is showing following error. All other servers running in the Farm are working fine.

Error
Network or dial-up problems are preventing communication with Citrix XenApp server.
If the problem persists, please contact your network administrator.


Need your help to resolve this issue.
cbinayakAsked:
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John TsioumprisSoftware & Systems EngineerCommented:
Can you ping this specific server...maybe you have some hardware issue ...from a faulty cable to a faulty NIC...or even more...
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cbinayakAuthor Commented:
Server is absolutely fine...I am able to Ping and RDP into it...no problem with the network....IMA Service along with other Citrix services are running without any problem....server has been rebooted...still problem persists.
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John TsioumprisSoftware & Systems EngineerCommented:
how about a firewall blocking the communication then
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cbinayakAuthor Commented:
Ports are reachable
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Sekar ChinnakannuStaff EngineerCommented:
IS this happens to all users or any specific users? Also any change in environment.
Check with licensing side and make sure no issue. Also try to delete this entry HkeyLocalMachine/Software/Microsoft/MSLicensing/Store and under store license000 and check.
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cbinayakAuthor Commented:
Problem is resolved. ICA-tcp connection was corrupted. I recreated the connection.
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cbinayakAuthor Commented:
Exported the ICA -TCP port registry key from a working XenApp server and then imported it in the non working server to recreate the ICA-TCP listener.

HKLM\System\CurrentControlSet\Control\TerminalServer\WinStations\ICA-TCP
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