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It must be something totally basic... published? stock? with price etc etc
Whatever SEF you are using is preventing VM products from showing.Try this URL: http://www.nyomtatokazetta.hu/index.php?option=com_virtuemart&view=virtuemart&productsublayout=0&Itemid=130It is really a requirement when developing a new site to turn of all SEF so that you can see what component & view is actually being used. Only turn on SEF once the site is set up and running.