My post are not showing correctly: symbol missing "<" and php is ok "libxml2 Version => 2.7.3"

Hi,

I just downloaded blog 2 days ago.
It look like great but I have a problem during the transmission of datas.

I don't have the following symbol "<" in the post publish in my wordpress blog. (<a href="http://www.eupmc.eu/mac" rel="nofollow">www.eupmc.eu/mac)
But if Itake the html blogo is creating I can insert it and it is ok.

The problem is between the moment I click on post and the moment it show the preview.

I have read on your site that I need to contact my web hosting company. I did it and I have send them the link. There answer is:

I have checked the server error logs and could not see any thing there. Also libxml2 version 2.7.3 module is added in php on the server. It could be an error with bolgo, could you please get touch with blogo support and let us know if there is any specific requirement for blogo that needs to be enabled on the server.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
php -i|grep libxml2
libxml2 Version => 2.7.3
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I would like to know if you could help me please.

Thank you very much.
I really would like to make it work...

Thomas.