sftp failed on channel 0

[Ramesh Dharma]

Hi ,

I just recently installed OpenSSH_3.0.2p1 on a HP-UX box.
The ssh works fine but the sftp is not.
There is a firewall in between both the machine.
Only SSH port is allowed from the source host to the destination machine.
ssh works fine across the firewall.
Below is the log.
Thanks in advance .

~~~~~~~~~~~~~~~~~~~~~~~~~~~`
<ixos2:/home/smorrx> sftp spdns1
Connecting to spdns1...
smorrx at spdns1's password:
Request for subsystem 'sftp' failed on channel 0
Connection closed
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`

Cheers,
Ramesh