can't get into admin

[adi5402]

I am having the same problem my admin page has gone blank

I am getting this error in my logs

PHP Fatal error:  main() [<a href='function.require'>function.require</a>]: Failed opening required 'DIR_FS_CATALOG_LANGUAGESenglish/meta_tags.php' (include_path='.:/usr/local/lib/php-4.4.7/lib/php') in /hermes/bosweb/web164/b1643/sl.thechess/public_html/shop/admin/includes/languages/english.php on line 50

I am now looking at the sql settings as suggested 2 threads above

This has done my head in

i am losing my sleep

[cobasa]

new install of latest version. couldn't access admin. this is still an issue. resend pass doesn't work. resetting values to defaults as described here doesn't work.