PUTTY plink getting bsh error

I'm getting a bsh error when I try to use PUTTY's plink command to execute a
DSPNETA command on iseries. From the log, it seems like plink is trying to
start the bash shell and is not able to do so on iseries. Does anyone know
if I need to do some kind of setup in iseries for this to work? Thanks

Below is the verbose from plink (Notice the 3rd line on from the bottom says
"bsh: mcbell4: not found":

C:\DOCUME~1\LIM~1.HOC>plink -v -ssh mcbell4 system "dspneta"
Looking up host "mcbell4"
Connecting to 10.100.50.14 port 22
Server version: SSH-1.99-OpenSSH_3.5p1
Using SSH protocol version 2
We claim version: SSH-2.0-PuTTY_Snapshot_2009_08_20:r8624
Doing Diffie-Hellman group exchange
Doing Diffie-Hellman key exchange with hash SHA-1
Host key fingerprint is:
ssh-rsa 2048 83:17:fb:bc:f5:1d:01:e4:5a:86:0d:9a:38:e3:c1:14
Initialised AES-256 CBC client->server encryption
Initialised HMAC-SHA1 client->server MAC algorithm
Initialised AES-256 CBC server->client encryption
Initialised HMAC-SHA1 server->client MAC algorithm
Reading private key file "C:\sshKey\PrivateKeylim.hock-chai@xxxxxxxxxxxxx"
Using username "sshpub".
Offered public key
Offer of public key accepted
Authenticating with public key "rsa-key-20090911"
Access granted
Opened channel for session
Started a shell/command
bsh: mcbell4: not found
Server sent command exit status 1
Disconnected: All channels closed