Hi, I have a problem with my site since yesterday. When i want to visit it, it show this:

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, ... and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

A friend of mine tellme that the problem is the template because i can open the back page.
I'm using joomla 2.5.7 an YTNews template.
Please helpme

Dear Irina,

I think that this issue is occurred by the ht access file or some installed extensions.

Please check them again.

Thanks