Blog home not working after blogs have been enabled
 

I have enabled my blog again, but while my bloglist page works OK, the "blog home page"
/forum/blog.php cannot be shown and shows this:

Fatal error: is_member_of_blog(): $bloginfo['permissions'] not defined. in [path]/includes/blog_functions_shared.php on line 281
#0 vb_error_handler(256, is_member_of_blog(): $bloginfo['permissions'] not defined., /home/euinfo/public_html/europanet/forum/includes/blog_functions_shared.php, 281, Array ([userinfo] => Array ([userid] => 1,[temp] => ,[

etc. etc.

Any ideas?