-- the following security error is seen for the incoming transfers:
SECS108E 18.10.2010 16:33:30 Server(1) SSH profile not found, check configuration
NET062E   18.10.2010 16:33:30 (4) session cannot be initiated, check configuration.

* this error occurs due to the fact that there is no security profile (Server) defined.
A security profile can be created as below:

1) from the Gateway Navigator -> Security Management -> Transfer Security Management -> Security Profile -> SSH Profile -> right click New ...
2) create the SSH profile, in server mode, with the desired functionality
3) once created, return to the NPROF (network profile) and attach to it the newly created SSH profile