I hope I have posed this in the right place, if not please feel free to move it.   
I'm having a problem with my Wordpress website, www.jamesshelford.co.cc. When I log in and try to use the permalinks function it loads a blank page. I have done some research and many people blame this on an absence of the mod_rewrite function but I believe HelioHost supports this. I have also made sure my .htaccess file is correct, I have posted this below.   
 # BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /wordpress/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wordpress/index.php [L]
</IfModule>
# END WordPress   
Has anyone else had this problem or can anyone help me?   
Thanks very much,   
James   
EDIT: I've found some other posts on here describing this problem http://www.helionet.org/index/index.php?showtopic=6469, http://www.helionet.org/index/index.php?showtopic=6144