1976892 - HTTP Error 500.0 - Internal Server Error calling GetProcAddress on ISAPI filter "C:\inetpub\wwwroot\ias_relay_server\client\rs_client.dll"

Customer installing  SMP 2.3 Relay server :

• Error seen:on the IIS 7.5 Server:
  HTTP Error 500.0 - Internal Server calling GetProcAddress on ISAPI filter "C:\inetpub\wwwroot\ias_relay_server\client\rs_client.dll"
• Error in the IIS Logs:
  2014-02-10 07:19:00 10.6.107.150 POST /ias_relay_server/server/rs_server.dll - 80 - 10.6.107.150 IAS_OE_TempChannel 500 0 127 5
  
• Error in the RSOE Log:
  E. 2014-02-10 12:53:36. <OEHost> Received an unexpected HTTP error from the web server:HTTP/1.1 500 Internal Server Error                         Cache-Control: private                         Content-Type: text/html; charset=utf-8                         Server: Microsoft-IIS/7.5                         Date: Mon, 10 Feb 2014 07:23:36 GMT                         Content-Length: 6052                                                 
  E. 2014-02-10 12:53:36. <OEHost> doHTTPRequest: read reply failed
  

• SAP Mobile Platform (SMP)  2.3
• Relay Server Version 12.0.1.3817
• Microsoft IIS 7.5  WEB Server

GetProcAddress
ISAPI , KBA , MOB-SUP-RT , SUP Runtime , Problem