Dropbear Portforwarding question

[connectnet at web.de]

Hi!
I have a ssh connection from my mobile phone to my homeserver like ssh -i  
my_key 4444:localhost:2222 name at homeserver.com
Dopbear is listening at mobile phone at 2222 with command #dropear -a -p  
2222 and works.
So I would like to initiate a Socks 5 Proxy connection from my firefox at  
homeserver to the mobile phone like
"ssh -i mykey -p 4444 root at localhost -D 55555 N" and setting in firefox  
the network connection to socks5 127.0.0.1 port 55555.

But it doesnt works. Could you help me please to find out how fix this?

Greetings,
connectnet