typo3 - BE AJAX request delivers empty repository -

i want build extension reading repository extension , delivers data csv/xsl/xslx without saving on server. e.g outputs data in blank window modified headers.

the ajax request fired with

$typo3_conf_vars['be']['ajax']['tx_myext::ajaxid'] = 'filename:object->method';

the repository if called backend work fine too.

public function ajaxaction() { ... $this->extrepository =& t3lib_div::makeinstance('tx_mysecondext_domain_repository_datarepository'); ... } 

but when called domain.tld/typo3/ajax.php?ajaxid=tx_myext::ajaxid doesnt find tx_mysecondext_domain_repository_datarepository if call repository of second repository findall() methode directly ajax. return null.

also when setting querysettings hand

public function findallexport() {     $query = $this->createquery();             $query->getquerysettings()->setrespectstoragepage(false);      return $query->execute(); } 

also fyi on 4.5

edit:

calling repository objectmanager doesn't work too

$objectmanager = t3lib_div::makeinstance('tx_extbase_object_objectmanager');     $this->extrepository = $objectmanager->get('tx_mysecondext_domain_repository_datarepository'); 

did make sure other extension loaded before own extension loaded? @ localconf.php. need specify dependencies in ext_emconf.php before install extension.

also make sure have added both extension's configurations static includes of typoscript template.