My b2evolution Version: 2.4.1

Hi people. I search in the forum about my problem but I didn't found some solution.

So, I expose it to you.

Some blogs of my websites have an url like this : http://url_name.14octobre.org/
But with this configuration, I can't use permalink like http://url_name.14octobre.org/post-title or other configuration with directories : I have an error "Not Found - The requested URL /blahblahblah was not found on this server.". So, I must use http://url_name.14octobre.org/?p=123&more=1 and that is not what I want...

As my english is very poor (I'm sorry), I present you some demonstrations :
Solution 1 : OK but not what I want
Site : http://kartncrazy.14octobre.org/
Article : http://kartncrazy.14octobre.org/?p=27&more=1&c=1&tb=1&pb=1

Solution 2 : Error but that is what I want.
Site : http://bacasable.14octobre.org/
Article : http://bacasable.14octobre.org/test-image-lightbox-skin-simplezen

Thanks for reading this post and I hope you could help me.