[mistwang]

You should try the 4.0.4 build by changing the version number in the download link.
With earlier release, you may get 503 error during application startup when Rails app was started on demand and the frame work takes more than 15 seconds to initialize.
4.0.4 should take care of it.

You can set "Run on start up" to have you app start with LSWS.
http://www.litespeedtech.com/docs/we.../#runOnStartUp