If you used the Service Interfaces feature generate a Web Forms client for a CICS service interface, the name of the folder must be the project name, and it must be located in \inetpub\wwwroot. For example, c:\inetpub\wwwroot\esbank where esbank is the project name.
If you cannot copy the files because of a "file is in use" error, you need to stop IIS and restart it. Then you should be able to copy the files.
Where:
cd IISpath\projectname\bin regsvr32.exe servicenameProxyWrapper.dll
Where servicename is the name of the generated service.