Getting an error when loading a spec in vim

```
Error detected while processing function    jasmine#load_snippets..jasmine#snippets_directory..jasmine#directory:
line    9:
E121: Undefined variable: g:jasmine_directory
E15: Invalid expression: g:jasmine_directory
```

This is on a fresh Jasmine gem install (for Rails). I'm no Vim master so I'm a bit stuck on how to debug this. Any pointers would be great.
