Update to version 0.2.3 of xajax. For changelog of xajax 0.2.3 see: http://wiki.xajaxproject.org/0.2.3_Release_Notes. ATTENTION: renaming of Classes to TYPO3 standards: xajax to tx_xajax, xajaxResponse to tx_xajax_response since 0.2.0. See Changelog.