SFTP/SCP Server - connection issues

Instead of using FTP we need to use SCP Protocol due to security restrictions.

Therefore I installed SFTP/SCP Server which works fine in combination with PuTTYs PSCP commandline tool.

Unfortunately commands issued on SAN Switches (Brocade) do only connect partly and only with having SSH1 enabled. (Transfer is working fine in this case, despite there is an error message on the SAN Switch side.) With other SAN Switch commands it doesn't work at all, there is even no message in the log window.

Any hints are welcome.