Right, well, I've had this error before. For me, it has meant that I was behind a firewall or blocked by anti-virus, which had been configured for Silkroad.exe to work, but not for SRO_client.exe. If you are using a program such as proxycap to gain access, then add a HTTPS with port 8080 under proxies, and add a new rule for sro_client.exe with only TCP checked, and using the proxy you just made.