Hello,
 
I move all the files of my magento store to a sub-directory (e.g from http://mydomain.com to http://mydomain.com/store ) and I'm getting HTTP error 500 when i try to see my store.
 
I also change the values of the web/unsecure/base_url and web/secure/base_url fields in the core_config_data table to http://mydomain.com/store, but I'm still getting the same error.
 
 
How can I fix this problem?
It is something related to the htaccess file?
How can I display the PHP errors?
 
Additional Information: 
1. When i navigate to http://mydomain.com/store/some_url I'm being  redirect to the root directory
2. The directory  http://mydomain.com/store/ is under protected by Basic HTTP Authentication.
 
Thank you!