Permissions

You will either need to 1) grant access to your module or 2) exclude it from policy checking.

1) Grant anonymous role access to module
Users > roles > edit anonymous > new > Choose you module > Allow all > Store

2) Edit settings/override/site.ini.append.php and add
[RoleSettings]
PolicyOmitList[]=myextension


Cheers
Bruce
http://www.designit.com.au