jasmine support for jenkins

Hi, I'm trying to setup jasmine for jenkins but get no success.
I'm using ruby on rails and this gem https://github.com/pivotal/jasmine-gem
It says use

```
rake jasmine:ci
```

for your continues integration tool, but when I run this rake I get an error
http://pastie.org/4790326

Any ideas what could that be?

thanks, Eugene