Why do I keep receiving the Choose Event message?
If you are seeing the choose event page repeatedly, it is likely to be caused by the fact you are not allowing this website use cookies. Cookies are used by EvBoo to record information about your registration (such as registration id etc). Without this information the application will not work correctly.
To resolve this issue, we recommend that you enable cookies for the EvBoo application.
You can enable cookies click the link for your browser :
Not all cookies are good
Here is some independent information about cookies.