Chris,
the correct proposition is c) We use a .Net Assembly inside of a PB Classic application to connect to a web service?
and
b) The PB Application is on a Server using the ??? O/S?
The application is on a Terminal Server and we connect us to the TS, but there we get the error but not on standalone workstation. On TS and Workstation (win7 64 bit or WinXP) are the same libeay32.dll.
I tried to the libeay32.dll from Shared Powerbuilder still the same error,