admin/login.php page totally blank - cannot log in

[shags38]

Hi - I have read and actioned all the points in the FAQ.

domain/store/admin/login.php is showing up totally blank so I cannot log in (page source also shows a totally blank page) - there is no 404 error.
domain/store/admin/ shows a blank page
domain/store/ resolves to the store as it should

I have set up a store as domain/store - the store was originally in the root. I installed a new ZC (same version) in folder /store/ then copied the store from the root and copied that (everything) into the new installation and then copied existing db into new db - the store works fine. I have checked both configure.php files for accuracy and ensuring https addresses are the same. I have also run fix_cache_key.php and cleared browser cache and even rebooted system.

I figure maybe there is something I copied over from the root store to new installation that has caused this - any ideas? domain is http://www.dazzlers.net.au

Any and all assistance is appreciated.

cheers,
Mike