Alias "application.extensions.langhandler.ElangHandler" is invalid. Make sure it points to an existing PHP file.

I have a site developed and is working fine on development machine (Mac OS X 10.7). However when I port it over to a Linux server I ran into error:

It supposedly is a permission problem according the below article:

However, I checked and the protected/extensions folder and down all have 755 permission. I even tried to make the whole protected folder 777 just to see if I can get it working at all, but it didn’t work either.

What else can be the cause? Can anyone help?

The most common problem on linux is that this is a case sensitive OS… so check that…

Thank you! That was it. The file is ELangHandler with a capital L…