default .htaccess is usless

[delicjous]

Perhaps xou need to uncommend some of this:

#If you used friendly urls in vB4, then uncommenting the following rules will redirect the #
	#old vB4 urls to a similar location in vB5.  This is unnecesary for a new vB5 install.
	#RewriteRule ^threads/.* showthread.php [QSA]
	#RewriteRule ^forums/.* forumdisplay.php [QSA]
	#RewriteRule ^members/.* member.php [QSA]
	#RewriteRule ^blogs/.* blog.php [QSA]
	#RewriteRule ^entries/.* entry.php [QSA]

	#To redirect users to the secure version of your site, uncomment the lines below 
	#RewriteCond %{HTTPS} !=on
	#RewriteRule .* https://%{SERVER_NAME}%{REQUEST_URI} [R=301,L]