Permission Denied after migration to new server

Hi,

I had to migrate to a dedicated server which I ordered for myself and because of having no money(!) I had to configure apache, myself (I did not know anything about apache and server configuration and did it with google help!)

Now, I can login into movable type, but when I want to publish, I get this error:

Writing to '/home/www/mysite.com/public_html/archives/author/admin-1/2009/06/index.php.new' failed: Opening local file '/home/www/mysite.com/public_html/archives/author/admin-1/2009/06/index.php.new' failed: Permission denied

Even changing the permission of files and directories too 777, I get this error. I tested to Page Archive that is a static, and got the same error:

Writing to '/home/www/mysite.com/public_html/contactus.php.new' failed: Opening local file '/home/www/mysite.com/public_html/contactus.php.new' failed: Permission denied

the owner and group of all files and directories are mysiteuser:mysiteuser. Do I need to grant permission to the group? If so, how?
My .htaccess file :

Options -Indexes +SymLinksIfOwnerMatch

  <IfModule mod_rewrite.c>

  <IfModule mod_dir.c>

    DirectoryIndex index.php index.html index.htm default.htm default.html default.asp /mtview.php

  </IfModule>

  RewriteEngine on

  RewriteCond %{REQUEST_FILENAME} !-d

  RewriteCond %{REQUEST_FILENAME} !-f

  RewriteRule ^(.*)(\?.*)?$ /mtview.php$2 [L,QSA]

</IfModule>

<IfModule !mod_rewrite.c>

  ErrorDocument 404 /mtview.php

  ErrorDocument 403 /mtview.php

</IfModule>

With this .htaccess, all my pages (even html and non MT files) get Internal error 500. I looked into error_log file of apache and noticed about this error:

/home/www/mysite.com/public_html/.htaccess: Options not allowed here

And if I comment the Option in .htaccess, I get this error in error_log file:

/home/www/mysite.com/public_html/.htaccess: DirectoryIndex not allowed here

So I renamed the .htaccess file to run my site.

I asked two of my friends who know MT very well and both of them told me that the problem is because of wrong apache configuration.

I'm asking you here and if you want any additional info, write here and I'll answer you to solve this issue!
Here, some more information that I think can help you to find the solution:
httpd.conf:

DocumentRoot  "/home/www"

<Directory />
Options FollowSymLinks
AllowOverride None
</Directory>

<Directory "/home/www">
Options Indexes FollowSymLinks
AllowOverride All
Order allow,deny
Allow from all
</Directory>

DirectoryIndex index.html index.htm index.php

AccessFileName .htaccess

ScriptAlias /cgi-bin/ "/home/www/cgi-bin"

<Directory "/home/www/cgi-bin">
AllowOverride None
Options None
Order allow,deny
Allow from all
</Directory>
VirtualScriptAlias /home/www/%0/public_html/cgi-bin/

Mysite conf file:

<VirtualHost 67.205.X:80>



        ServerName mysite.com

        ServerAlias www.mysite.com

        ServerAdmin myemail@gmail.com

        DocumentRoot /home/www/mysite.com/public_html

        ScriptAlias /cgi-bin/ /home/www/mysite.com/public_html/cgi-bin/

        <Directory /home/www/mysite.com/public_html>

                Options Includes

                Order allow,deny

                Allow from all

                AllowOverride AuthConfig

        </Directory>

</VirtualHost>

My OS: CentOS 5 x86_64 bit

Thanks,
Alireza