[Serusers] Mediaproxy Problem

[Ricardo Martinez]

Hi.
	When i try to make a call in a NAT enviroment i get the next error
in the debug from my SER.

1(2825) error: mediaproxy/sendMediaproxyCommand(): can't connect to
MediaProxy

I guess this is because the mediaproxy is not running, but i followed all
the steps in the INSTALL file to start the mediaproxy.
I used : 

/etc/init.d/mediaproxy start

and even 

[root at sipproxy mediaproxy]# ./mediaproxy.py 
  File "./mediaproxy.py", line 84
    print >>sys.stderr, "Mediaproxy error: %s. Exiting." % why
           ^
SyntaxError: invalid syntax
[root at sipproxy mediaproxy]# 

But i can't see any "mediaproxy" process running.

Any ideas?
Any help will be accepted.

Thanks in advance.

Ricardo