Socket Error Code 10038 ($2736)

Hi All

I submitted my client corporation tax and I keep getting this error message shown below ?

'The following was raised on performing the http post: cannot connect to sever on host 'transaction engine.tax.service.gov.uk'

An operation was attempted on some thing that is not a socket

Socket error code 10038 ($2736)

Please can anyone advise me on how to resolve this problem

Your replies would be most appreciated thanks.