I develop a module with custom connection to custom database, and i'm using it through Mage_Core_Model_Abstract, Collection etc. But in exception.log i see
Exception message: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'dbname.table_prefix_tablename' doesn't exist
But my custom db doesn't have a table prefix. I've tryed to override table_prefix
<global> <resources> <db><table_prefix><![CDATA]></table_prefix></db> <customdb_write> ...
but it doesn't work. What can i do?