Erro na instalação (RESOLVIDO)

Amigos. Já resolvi o problema lendo os outros posts. Passei a usar o Wamp e troquei a versão do PHP e resolveu!!!

<!-- s:( --><img src="{SMILIES_PATH}/icon_e_sad.gif" alt="" title="Triste" /><!-- s:( --> Por favor, preciso urgente de ajuda. Instalei recentemente o Joomla 1.5.14 usando tb o Xampp, rodando localmente. Após a instalação, no administrativo, aparece uma série de erros na administração de menu, artigos, banners e outros lugares.
Estou colando abaixo algumas mensagens. Alguém poderia me ajudar?

Administrar Menu:
Warning: Parameter 4 to JHTMLMenu::treerecurse() expected to be a reference, value given in C:\xampp\htdocs\joomla\libraries\joomla\html\html.php on line 87
Warning: array_slice() expects parameter 1 to be array, null given in C:\xampp\htdocs\joomla\administrator\components\com_menus\models\list.php on line 143
Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\joomla\administrator\components\com_menus\models\list.php on line 147
Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\joomla\administrator\components\com_menus\views\list\view.php on line 65
Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\joomla\administrator\components\com_menus\views\list\tmpl\default.php on line 69

Administrar Seções:
Warning: Parameter 1 to JHTMLGrid::access() expected to be a reference, value given in
C:\xampp\htdocs\joomla\libraries\joomla\html\html.php on line 87
Warning: Parameter 1 to JHTMLGrid::checkedOut() expected to be a reference, value given in C:\xampp\htdocs\joomla\libraries\joomla\html\html.php on line 87
Warning: Parameter 1 to JHTMLGrid::published() expected to be a reference, value given in C:\xampp\htdocs\joomla\libraries\joomla\html\html.php on line 87
Warning: Parameter 1 to JHTMLGrid::access() expected to be a reference, value given in
C:\xampp\htdocs\joomla\libraries\joomla\html\html.php on line 87
Warning: Parameter 1 to JHTMLGrid::checkedOut() expected to be a reference, value given in C:\xampp\htdocs\joomla\libraries\joomla\html\html.php on line 87
Warning: Parameter 1 to JHTMLGrid::published() expected to be a reference, value given in C:\xampp\htdocs\joomla\libraries\joomla\html\html.php on line 87
Warning: Parameter 1 to JHTMLGrid::access() expected to be a reference, value given in C:\xampp\htdocs\joomla\libraries\joomla\html\html.php on line 87
Warning: Parameter 1 to JHTMLGrid::checkedOut() expected to be a reference, value given in C:\xampp\htdocs\joomla\libraries\joomla\html\html.php on line 87
Warning: Parameter 1 to JHTMLGrid::published() expected to be a reference, value given in C:\xampp\htdocs\joomla\libraries\joomla\html\html.php on line 87

obrigado pela organização !!