Internal Server Error message after blocking IP address - HELP!!!

I was in the admin panel of my site and saw that someone was trying to hack in and I tried blocking their IP address and when I tried to get back in to my site I got this message below, I cannot reach the person that hosts my site and I was wondering if anyone can tell me how I can get back into my admin panel, I can get in to my control panel but the site is down and I can't get into the admin panel. Thanks for your help, here is the error message::
Internal Server Error

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

Please contact the server administrator, [email protected] 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.

Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.
Apache/2.2.11 (Unix) mod_ssl/2.2.11 OpenSSL/0.9.8i DAV/2 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at https://www.4kidzpartyz.com Port 80

What makes you think that there was a hack attempt?

I'd go 2 ways:

1. read and apply https://www.zen-cart.com/wiki/index.php/Recovering_From_Hacks

2. unblock the IP address and see what happens

Frank

Sounds like some incorrect information was entered into your main .htaccess file and causing your site not to work.

Using your FTP program to download and edit the .htaccess file or use File Mgr. within your Hosting Control Panel, you can remove the line with the IP address you entered. If not sure what to remove you can rename your .htaccess file to .htaccess_old. As I'm not sure what is in the .htaccess and you may have other information needed by your site, you could also upload a backup of that file, if you have one.