Question about my forum

[rlodge]

I have a website built using Website Baker. I added a forum link to my forum which is an SMF forum using the default theme for now. I integrated Ajax chat into the forum. Every tiime I click on the link to go to my froum from my webpage I end up having to hit F5 at least once to get the login page to show and then, once I login, I have to hit F5 2 - 3 times to get the forum to show. I'm not getting any error messages of 404 errors, just a white screen. This happens in IE7, Opera and Firefox.

Has anyone seen this before and, if you have, could you share what might be the cause and solution? The website is at http://msmcctt.exofire.net and the forum is at http://msmcctt.exofire.net/forum. If the login page loads fine for everyone else then I guess it's just me.

Thanks.

In the quote below, this is what I have in the error log in the cPanel. The "xx.xx.xxx.xxx" is my cable modem's IP address. This tells me that I am attacking my site according to the error log.

[Thu Mar 13 07:53:49 2008] [error] [client xx.xx.xxx.xxx] ALERT - function within blacklist called: shell_exec() (attacker 'xx.xx.xxx.xxx', file '/home/username/public_html/forum/Sources/Subs.php', line 3484), referer: http://msmcctt.exofire.net/forum/
[Thu Mar 13 07:53:43 2008] [error] [client xx.xx.xxx.xxx] ALERT - function within blacklist called: shell_exec() (attacker 'xx.xx.xxx.xxx', file '/home/username/public_html/forum/Sources/Subs.php', line 3484), referer: http://msmcctt.exofire.net/forum/
[Thu Mar 13 07:51:01 2008] [error] [client xx.xx.xxx.xxx] ALERT - function within blacklist called: shell_exec() (attacker 'xx.xx.xxx.xxx', file '/home/username/public_html/forum/Sources/Subs.php', line 3484), referer: http://msmcctt.exofire.net/
[Thu Mar 13 07:51:00 2008] [error] [client xx.xx.xxx.xxx] ALERT - function within blacklist called: shell_exec() (attacker 'xx.xx.xxx.xxx', file '/home/username/public_html/forum/Sources/Subs.php', line 3484), referer: http://msmcctt.exofire.net/
[Thu Mar 13 07:50:59 2008] [error] [client xx.xx.xxx.xxx] ALERT - function within blacklist called: shell_exec() (attacker 'xx.xx.xxx.xxx', file '/home/username/public_html/forum/Sources/Subs.php', line 3484), referer: http://msmcctt.exofire.net/
[Thu Mar 13 07:50:58 2008] [error] [client xx.xx.xxx.xxx] ALERT - function within blacklist called: shell_exec() (attacker 'xx.xx.xxx.xxx', file '/home/username/public_html/forum/Sources/Subs.php', line 3484), referer: http://msmcctt.exofire.net/
[Thu Mar 13 07:50:56 2008] [error] [client xx.xx.xxx.xxx] ALERT - function within blacklist called: shell_exec() (attacker 'xx.xx.xxx.xxx', file '/home/username/public_html/forum/Sources/Subs.php', line 3484), referer: http://msmcctt.exofire.net/
[Thu Mar 13 07:50:52 2008] [error] [client xx.xx.xxx.xxx] ALERT - function within blacklist called: shell_exec() (attacker 'xx.xx.xxx.xxx', file '/home/username/public_html/forum/Sources/Subs.php', line 3484), referer: http://msmcctt.exofire.net/

Edit:
THis will probably be appended to my other post but I think I have the problem fixed.

I had the forum doing "hostname lookup". As soon as I disabled this, everything seems to work now. SMF said that having this disabled would make banning someone harder to do but since this is going to be a restricted forum (for work) and everyone has to contact me so I can give them their userid and password this shouldn't be a problem.