Hydra Problem

Hi
I have completed compiling the hydra code
when I run the py files
hydra-tunnel /opt/hydra/gr/share/hydra/sconf-1

error occur as folow:

[TUNSERVER]: Cannot bind to socket (%s,%s)!
Address already in use!

any1 know why Address already in use?
I use ifconfig command to check it,but there is no new eth, and the IP
address in the configure file sconf-1 is not been used.
Can any1 tell the mistake reason?
Thank u all.