Unable to specify ssh parameters

I can see how this works with an ssh tunnel that has no password and uses the standard port (22). I need to specify several such parameters however. Perhaps I just missed something?

I tried putting these in the "process arguments" section, but that doesn't seem to work.

Specifically, I want to do this:

ssh -fN -p 2222 -D 1080 root@127.0.0.1

How can I specify to use 2222 as the ssh port and to login as root, which should prompt for a password? (These options are absolutely necessary for my ssh tunnel, -fN is not so important however).

When I put those arguments in "process arguments", sshsplit outputs:

Traceback (most recent call last):
  File "/usr/bin/sshsplit", line 132, in on_btnBegin_clicked
    listenhost, listenport)
  File "/usr/bin/sshsplit", line 190, in __init__
    self.listenport = int(listenport)
ValueError: invalid literal for int() with base 10: ''
Starting 5 SSH instances.
Started SSH on port 1081.
Launching ssh - f N - p 2 2 2 2 r o o t @ 1 2 7 . 0 . 0 . 1
Started SSH on port 1082.
Launching ssh - f N - p 2 2 2 2 r o o t @ 1 2 7 . 0 . 0 . 1
Launching ssh - f N - p 2 2 2 2 r o o t @ 1 2 7 . 0 . 0 . 1
Started SSH on port 1083.
Started SSH on port 1084.
Launching ssh - f N - p 2 2 2 2 r o o t @ 1 2 7 . 0 . 0 . 1
Started SSH on port 1085.
 Launching ssh - f N - p 2 2 2 2 r o o t @ 1 2 7 . 0 . 0 . 1
Child process died.
Child process died.
Child process died.
Child process died.
Child process died.

I also tried typing the binary line as "ssh -p 2222 root@127.0.0.1" and leaving "listen host" blank:

Starting 5 SSH instances.
Started SSH on port 1081.
Launching ssh -p 2222 root@127.0.0.1 -ND 1081
Started SSH on portLaunching ssh -p 2222 root@127.0.0.1 -ND 1082
 1082.
Started SSH on port 1083.
Launching ssh -p 2222 root@127.0.0.1 -ND 1083
Started SSH on port 1084.
Launching ssh -p 2222 root@127.0.0.1 -ND 1084
Exception in thread Thread-2:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
    self.run()
  File "/usr/bin/sshsplit", line 224, in run
    stderr=subprocess.PIPE)
  File "/usr/lib/python2.6/subprocess.py", line 621, in __init__
    errread, errwrite)
  File "/usr/lib/python2.6/subprocess.py", line 1126, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

Launching ssh -p 2222 root@127.0.0.1 -ND 1085 Started SSH on port 1085.

Exception in thread Thread-3:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
    self.run()
  File "/usr/bin/sshsplit", line 224, in run
    stderr=subprocess.PIPE)
  File "/usr/lib/python2.6/subprocess.py", line 621, in __init__
    errread, errwrite)
  File "/usr/lib/python2.6/subprocess.py", line 1126, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

Exception in thread Thread-5:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
    self.run()
  File "/usr/bin/sshsplit", line 224, in run
    stderr=subprocess.PIPE)
  File "/usr/lib/python2.6/subprocess.py", line 621, in __init__
    errread, errwrite)
  File "/usr/lib/python2.6/subprocess.py", line 1126, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

Exception in thread Thread-4:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
    self.run()
  File "/usr/bin/sshsplit", line 224, in run
    stderr=subprocess.PIPE)
  File "/usr/lib/python2.6/subprocess.py", line 621, in __init__
    errread, errwrite)
  File "/usr/lib/python2.6/subprocess.py", line 1126, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

Exception in thread Thread-6:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
    self.run()
  File "/usr/bin/sshsplit", line 224, in run
    stderr=subprocess.PIPE)
  File "/usr/lib/python2.6/subprocess.py", line 621, in __init__
    errread, errwrite)
  File "/usr/lib/python2.6/subprocess.py", line 1126, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

I was expecting an ssh tunnel to be created on port 1080, but I don't see any output to that effect (shall I try -v on the command line?) and also, in each case sshsplit must be "kill -9" terminted. None of the ssh processes survive either, but I am not sure if that's because they die waiting for a password or sshsplit can't pass the arguments I specified, or boh.(..?)