I have problems to use hydra with ssh.

I followed the steps in > hxxp://forums.remote-exploit.org/backtrack-4-package-feature-requests/23874-hydra-compiled-without-libssh-support.html
and now I have another problem. When I run: "hydra -s 22 127.0.0.1 ssh2" nothing happens.
When I run on xHydra (this line on the botton: hydra 127.0.0.1 ssh2 -v -l yourname -p yourpass -t 34) I have the following message on the output:
Code:
** (xhydra:10356): WARNING **: callbacks.c 529: popen_rw_unbuffered: execv() returned

** (xhydra:10356): WARNING **: /usr/local/bin/hydra

** (xhydra:10356): WARNING **: 127.0.0.1

** (xhydra:10356): WARNING **: ssh2

** (xhydra:10356): WARNING **: -v

** (xhydra:10356): WARNING **: -l

** (xhydra:10356): WARNING **: yourname

** (xhydra:10356): WARNING **: -p

** (xhydra:10356): WARNING **: yourpass

** (xhydra:10356): WARNING **: -t

** (xhydra:10356): WARNING **: 36
**
ERROR:callbacks.c:544:popen_re_unbuffered: code should not be reached
Can anyone help me?