The problem got fixed. Old SLD was on port 30000 but the new SLD is on port 40000. Thanks for feedback.

I am in process of upgrade to FP2305. In the existing system, it gives session ID but in upgraded version it always give this response I call login request.sCmd = @"<?xml version=""1.0"" encoding=""UTF-16""?>";sCmd += @"<env:Envelope xmlns:env=""http...