Im trying to install the easy single page checkout add on but when i try to upload the install.sql i get the following error message _


1062 Duplicate entry 'Permanent Account Holders Only' for key 'query_name'
in:
[INSERT INTO zen_query_builder ( query_id , query_category , query_name , query_description , query_string ) VALUES ( '', 'email,newsletters', 'Permanent Account Holders Only', 'Send email only to permanent account holders ', 'select customers_email_address, customers_firstname, customers_lastname from TABLE_CUSTOMERS where COWOA_account != 1 order by customers_lastname, customers_firstname, customers_email_address');]
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No options for the easy checkout appear in my settings so it has definately not worked. I have tried running the uninstall.sql and then installing again but get the same error message. I realy need to get this working as the standard checkout is a little to long, can anyone help?

Thank you.