Google Tools Network Unreachable

[dvancouver]

I have a huge issue here, google says I have over 44,000 urls that are Network Unreachable. I switched from ASP solution forum to PHP and now my traffic is 70% down. I must have done something wrong with my 301 redirects but cannot figure it out. Can anyone have a look please!

 

.htaccess file

 

<IfModule mod_rewrite.c>

Options +FollowSymLinks

Options +Indexes

RewriteEngine On

RewriteBase /

RewriteCond %{QUERY_STRING} TOPIC_ID=([0-9]+)

RewriteRule ^topic.asp$ /forum/index.php?showtopic=%1 [R=301,L,QSA]

RewriteCond %{QUERY_STRING} FORUM_ID=([0-9]+)

RewriteRule ^forum.asp$ /forum/index.php [R=301,L,QSA]

RewriteCond %{QUERY_STRING} ^TOPIC_ID=([0-9]+)&whichpage=([0-9]+)

RewriteRule ^forum.asp$ /forum/index.php [R=301,L,QSA]

RewriteCond %{QUERY_STRING} whichpage=([0-9]+)

RewriteRule ^forum.asp$ /forum/index.php [R=301,L,QSA]

RewriteCond %{QUERY_STRING} ^showtopic\=213083\&TOPIC_ID\=([^&]+)$

RewriteRule ^$ /forum/index.php? [R=301,L]

RewriteRule ^forum.asp$ /forum/index.php [R=301,L,QSA]

</IfModule>

 

I ran a headers tool and this is what I got back.

 

1. Requesting: http://example.com/forum

HEAD /forum HTTP/1.1

Connection: Keep-Alive

Keep-Alive: 300

Accept:*/*

Host: example.com

Accept-Language: en-us

Accept-Encoding: gzip, deflate

User-Agent: Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

 

Server Response: 301 Moved Permanently

Date: Sun, 06 Jan 2008 19:52:24 GMT

Server: Apache/2.2.3 (Red Hat)

Location: http://example.com/forum/

Connection: close

Content-Type: text/html; charset=iso-8859-1

 

Redirecting to http://example.com/forum/ ...

 

2. Requesting: http://example.com/forum/

HEAD /forum/ HTTP/1.1

Connection: Keep-Alive

Keep-Alive: 300

Accept:*/*

Host: example.com

Accept-Language: en-us

Accept-Encoding: gzip, deflate

User-Agent: Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

 

Server Response: 500 Internal Server Error

Date: Sun, 06 Jan 2008 19:52:24 GMT

Server: Apache/2.2.3 (Red Hat)

X-Powered-By: PHP/5.2.4

Connection: close

Content-Type: text/html

 

This is an example of the old URL it is trying to spider and I was trying to 301 redirect.

 

http://www.example.com/forum/forum.asp?FORUM_ID=2&whichpage=10

 

Thanks for any help here!