gem zeus crashes when i run command zeus start

gem zeus crashes when i run command zeus start

Steps I followed and point where I faced a problem:
1 gem install zeus
2 zeus start
At this point i faced:
Available Commands: [waiting] [crashed] [ready]
zeus server (alias: s) [run to see backtrace]
zeus console (alias: c) [run to see backtrace]
zeusrunner (alias: r) [run to see backtrace]
zeus dbconsole [run to see backtrace
zeus rake [run to see backtrace]
zeus generate (alias: g) [run to see backtrace]
zeus destroy (alias: d) [run to see backtrace]
zeus cucumber [run to see backtrace]
zeus test (alias: rspec, testrb) [run to see backtrace]
All in red colour which mean its crashed..
Thanks in advance for help.