doesn't work for me about hs-dvr-telnet

[pauldvg]

I posted too fast and thought that the PSK argument was the admin password of the nvr gui.
When I use ./hs-dvr-telnet 192.168.1.24 2wj9fsa2 (or ./hs-dvr-telnet 192.168.1.24) I get :

(venv) paul@paul-VirtualBox:~/hs-dvr-telnet$ ./hs-dvr-telnet.py 192.168.1.24 2wj9fsa2
[+] Opening connection to 192.168.1.24 on port 9530: Done
[*] sending OpenTelnet:OpenOnce...
[*] received challenge randNum:78483811
[*] using password 2wj9fsa2
[*] initializing (modified) 3des with key 784838112wj9fsa2
[*] sending encrypted challenge 83:EF:D3:4E:DC:BE:BB:2E:93:EE:A3:80:58:62:A3:39
[+] verify:OK
[*] sending encrypted command Telnet:OpenOnce...
Traceback (most recent call last):
  File "./hs-dvr-telnet.py", line 54, in <module>
    dvrHelper.open_telnet(args.password)
  File "./hs-dvr-telnet.py", line 42, in open_telnet
    self.recvuntil("Open:")
  File "/home/paul/hs-dvr-telnet/venv/lib/python3.6/site-packages/pwnlib/tubes/tube.py", line 310, in recvuntil
    res = self.recv(timeout=self.timeout)
  File "/home/paul/hs-dvr-telnet/venv/lib/python3.6/site-packages/pwnlib/tubes/tube.py", line 82, in recv
    return self._recv(numb, timeout) or b''
  File "/home/paul/hs-dvr-telnet/venv/lib/python3.6/site-packages/pwnlib/tubes/tube.py", line 160, in _recv
    if not self.buffer and not self._fillbuffer(timeout):
  File "/home/paul/hs-dvr-telnet/venv/lib/python3.6/site-packages/pwnlib/tubes/tube.py", line 131, in _fillbuffer
    data = self.recv_raw(self.buffer.get_fill_size())
  File "/home/paul/hs-dvr-telnet/venv/lib/python3.6/site-packages/pwnlib/tubes/sock.py", line 56, in recv_raw
    raise EOFError
EOFError

Thank you