I try extend an core class. But catch error: Warning: include( \\\\\\\\\\\\MyModule\Ajaxsearch\Model\Resource\Eav\Mysql4\Product\Collection \\\\\\\\\\.php) [function.include]: failed to open stream:...
Why magento add slashes to addres? May be config error?
Try enabling magic_quotes_gpc by commenting the flag in the .htaccess file.