Proxy Error reported

[msekar]

Hi,

Frequently while we click on any tabs or reports name in Testlink, it displayed Proxy Error ...

Kindly help me to solve this issue as we are currently using testlink in live.

Please find the below error.
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Proxy Server

The proxy server received an invalid response from the upstream server
The proxy server could not handle the request <link>

Reason:Error reading from the remote server
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I'm using Testlink with IIS 7.5