Error 500 internal server error !

The other day I was working on a site and encounter with this error, thinking myself that this was from the server admin I complained to him, since he didn't find the error I got myself to work and found a solution, this may not work to everyone but I did to me. This was the error that I get:



I solve this problem by changing the permission to the file where I was having the error to 0644 and then everything worked like a charm.

Just to add a few comments of this. I made this mistake when I was updating a file with the Aptana Studio 3, It results that I changes the permission and you have to be aware when you upload you files.