ssh_server_fork

["=?gb18030?b?zMDEzw==?=" <tangnan526@xxxxxx>]

Hi,
I run server example like this,
./ssh_server_fork -r ~/libssh/id_rsa -d ~/libssh/id_dsa -e ~/libssh/ecdsa -p 2222 192.168.2.7and connect to this server using./samplessh -l libssh -r ~/libssh/id_rsa.pub -p 2222 192.168.2.7But it not works,Connection failed : Failed to resolve hostname /home/tangnan/libssh/id_rsa.pub (Name or service not known)Could anybody tell me how to solve this problem?