[fw-mvc] How can I run a single zf application on different subdomains?

I have a website that I made with ZF and it is running on a server. Because I want this website to be multilanguage, I made some subdomains for the different languages on the webserver.
Lets say the site is running now on en.mywebsite.com. In this directory all the application code, data and library is located.
I also have on the same server these es.mywebsite.com and fr.mywebsite.com directories. My idea was to put the files that are normally in the /public directory of a zf application in these subdomain dirs. And by pointing the Application_path in the index.php files to the en.mywebsite.com/application I thought I could run the application on the subdomains.

When I open the es.mywebsite.com in my browser I get a error message like this:
Fatal error:  Uncaught exception 'Zend_Config_Exception' with message 'parse_ini_file(../application/configs/application.ini) [<a href='function.parse-ini-file'>function.parse-ini-file<a>]: failed to open stream: No such file or directory' in /var/www/zend/ZendFramework-1.9.7-minimal/library/Zend/Config/Ini.php:184

Is my approach correct to run a single application on different subdomains and how can I solve this?
Can someone help me with this problem? Thanks!

Regards,

Laurens van Vliet