Maps are not more working in Joomla! 1.5 or 2.5 (because of API key) - update your Joomla! and Phoca Maps component to the latest version and use the latest version of Phoca Maps
Phoca Maps: https://www.phoca.cz/phocamaps
Phoca Maps and Joomla! 3 demo: https://www.phoca.cz/joomla3demo/phoca-maps-demo