Remove and reconfigure SSHD setting after running Zend Studio 8.0 repair installation.

I happened to run Zend Studio 8.0 installer to "repair" my zend studio 8.0 for IBMi. However, I got below error message after I click the folder under Sftp files and My Home directory in the Remote Systems View window.
ProxyHTTP:java.ioException: proxy error: Forbidden

It is strange because a dialogue was pop up and asked me to input password. So, that means studio can see the sshd server running on i5/OS.

I tried many ways. But, the final solution is simple: deleting the exsiting SSHD server setting from the Remote Systems window and create a new one. Then, a new key is generated for remote sshd server and connection works just well now.