Problema in Gestione categorie / Categories management - Joomla! Forum - community, help and support

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cari amici del forum di joomla,
il nostro sito web ( http://www.webradioscout.org/) usa joomla 1.5.26;
da un paio di giorni se cerchiamo di entrare dal pannello di controllo in gestione categorie e da lì in una qualsiasi della categorie (p.es. interviste speciali) otteniamo questa risposta:
fatal error: call member function load() on non-object in /home/webradio/domains/webradioscout.org/public_html/administrator/components/com_categories/admin.categories.php on line 348
cosa dobbiamo fare concretamente?
vi prego spiegazioni prova di newbie... ;)
grazie sin d'ora, paolo
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dear friends, our website runs on joomla 1.5.26;
everything worked fine since days ago if try edit or open category admin panel - contents - categories management error message:
fatal error: call member function load() on non-object in /home/webradio/domains/webradioscout.org/public_html/administrator/components/com_categories/admin.categories.php on line 348
what have in simplest way?
thanks lot paolo
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aggiungo:
se provo creare una nuova categoria ottengo un messaggio di errore che dice:
table class jtablecategory not found in file.
per favore (e' una richiesta di aiuto non un urlo) qualcuno risponda
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post scriptum:
if try create new category following error message:
table class jtablecategory not found in file.
please give me answer , capital letters not shout simple request help






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