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Okay a couple of questions for you. &nbsp;Are you using an Access Gateway or just straight Web Interface? &nbsp;Did you upgrade your client to version 11? &nbsp;I have had issues with version 9 trying to connect to a 4.5 farm and get an error kinda just like that. &nbsp;
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Okay a couple of questions for you.  Are you using an Access Gateway or just straight Web Interface?  Did you upgrade your client to version 11?  I have had issues with version 9 trying to connect to a 4.5 farm and get an error kinda just like that.  

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After upgrading from presentation server 4 to 4.5 we are getting that error after clickin on the desktop application in the web interface and cannot connect to the server.
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After upgrading from presentation server 4 to 4.5 we are getting that error after clickin on the desktop application in the web interface and cannot connect to the server.

The Citrix SSL server you have selected is not accepting connections

Citrix is the synonym for the virtualization and application infrastructure systems developed by the company of the same name. Main areas are application virtualization, Software-As-A-Service (SaaS), cloud-computing and networking. The two most well-known are Citrix XenApp or Citrix CloudPlatform.

Citrix

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Transfer Protocol (HTTP) within a connection encrypted by Transport Layer Security (TLS) or its predecessor, Secure Sockets Layer (SSL). The main motivation for HTTPS is authentication of the visited website and to protect the privacy and integrity of the exchanged data. HTTPS is widely used for protecting page authenticity on all types of websites, securing accounts and keeping user communications, identity and web browsing private.