cannot access WinScp in the Command prompt but can access in the windows Screen.

The non-beta were installed by next-next-finish mostly using defaults, checked to register on %PATH% (verified ok) and to handle sftp:// and scp:// addresses. Upgraded to beta doing a full upgrade (recommended), and both executables are on C:\Program Files\WinSCP.
It is a Windows 2008 Server Standard SP2 (not R2).



winscp.com
The COM executable is a simple tool that internally runs winscp.exe and provides console interface for it.
What you can do with it:
Supports console mode only, but allows input/output redirection;
When run from another console application (such as standard Windows console/command-line window, i.e. cmd.exe), it inherits its console1).
When run from Windows shell (i.e. cmd.exe or batch file), the shell waits for WinSCP to finish. So you can then check for WinSCP exit code.
The COM executable needs the EXE one to operate. It looks for it in the same directory where it is located itself. The EXE must have exactly the same name.

Input/Output Redirection
For input/output redirection use standard operators:
> for output redirection;
< for input redirection;
| for piping.