意外的响应代码413 Godaddy托管服务器

I am using Godaddy hosting and I have come across the problem where I am sending data to the database. When I try to send data which size is around 4kB than it works perfectly. However, sending data that exceed 600kB or something around that, it just stops working. I got the Unexpected response code 413. I had made changes to the .htaccess file. It looks like this:

<IfModule mod_rewrite.c>
    RewriteEngine on

    # Allow Installatron requests
    RewriteCond %{REQUEST_FILENAME} deleteme\.\w+\.php
    RewriteRule (.*) - [L]

    RewriteBase /
    RewriteRule    ^(\.well-known/.*)$ $1 [L]
    RewriteRule    ^$    webroot/    [L]
    RewriteRule    (.*) webroot/$1    [L]
     php_value upload_max_filesize 10M
     php_value post_max_size 10M
     php_value max_execution_time 300
     php_value max_input_time 300
</IfModule>

Any ideas? thanks for your time.