I get error message after installing my manage package.... when I tried to insert a record to the Custom Object from public site which use authenticated licenses it gives me...

Insert failed. First exception on row 0; first error: INSUFFICIENT_ACCESS_OR_READONLY, user does not have access to use approval assignment email template: 

I ve search a little and Iam sure that: 

*I ve cloned the profile (Authenticated)

*Related object  is available for Customer portal so I gave the Modify All permission for cloned profile

*Also I have checked the sharing model and the related object has public read/write

*Related controller does not include "with sharing " keyword.

Any solution for this ??? 

Meantime this functionality works without any problem in package org and also all the conditions same...Problem is the org where I ve downloaded the package.