According to the SyGate website, SyGate has an Identity blocking option that will block the user-agent, you need to deactivate this.
From the SyGate website.
Identity blocking: (preventing dissemination of user system info such as browser, OS, etc.): Sygate Security Agent incorporates OS fingerprint masquerading and Stealth mode browsing features, which protect systems from OS fingerprinting methods, and block any attempts to obtain browser version and history.
Alternatively you can manually check for newer versions by browsing to our download page at
http://www.flashfxp.com/download.php
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