When performing various operations in the control panel that AJAX-enabled, clients may find the error message "AJAX failure: please try again" displayed continuously, even when attempting the operation multiple times.
In general, we have seen this most often when clients are using Macs and the Safari browser. The best solution is to switch to Firefox, where the AJAX functions appear to wok without issue. There is no ther known resolution at this time for the cPanel-embedded AJAX functions.