28 May 09 11:56 am
First, you site is working on my Mozilla web browser.
Ensure that your .htaccess is not 777 permission. 644 should suffice.
Also, if i were you, download you whole site to your PC. Try to search for suspicious iframe in all your index.php files. Attackers use this to redirects your visitors to other malicious sites with virus to infect your visitor's PCs.
Check the last update for all your files, and if you find that some of your 'system' files have been changed recently although you didn't do anything to it... try looking into it to see if there are those iframe code.
If you are using Wordpress, you may install the plugin:
which guides and provides a checklist of security which you can patch in WP.
Finally, scan your own PC with a proper virus scan. Your PC could have been infected as well or is the source that infected your websites during FTP.
Hope this helps... keep focus and keep on building your sites!