Magento my module extension sql installer script not run
Following are the possible reasons for not running your module sql script
(1) Open the database and check in core_resource table, Find your module setup record like "customlink_setup" and delete that record if you found and try again.
(2) Open the database and check in eav_attribute table, Find your attribute id like "thumbnail_link" in table and delete it if you found.
(3) Check Your module version in config.xml file and mysql installer file version number must be same
I Hope It will help you.
