Error in permalinks

I changed the default permalinks to a numeric permalinks but I can’t
rewrite .htaccess and I select again the default permalink.

But now in my dashboard, in permalink settings, appear me these messages and I don’t know what have I do:

Warning: is_writable() [function.is-writable]: open_basedir restriction in effect. File(/) is not within the allowed path(s): (/home/tiipocom/:/usr/lib/php:/usr/local/lib/php:/tmp) in /home/tiipocom/public_html/wp-admin/options-permalink.php on line 113

Warning: is_writable() [function.is-writable]: open_basedir restriction in effect. File(/) is not within the allowed path(s): (/home/tiipocom/:/usr/lib/php:/usr/local/lib/php:/tmp) in /home/tiipocom/public_html/wp-admin/includes/misc.php on line 130