thank you for replying.
ok, so far this is what i've done to try and resolve this issue.
i deleted the wordpress database via phpmyadmin and and deleted ALL the wordpress files (actually removed the whole directory out of the localhost path).
i installed wordpress again, from scratch, new database and new files. so far so good. BUT, in order to get somewhere close to where my site was in development, i opened the old wordpress folder (the one that i moved out of the localhost path and replaced with a new installation), and opened the plugins folder. copied all the plugin folders that were working and active at the time to the new fresh plugins directory. went into the admin. saw the plugins listed, but didn't activate anything.
next, went into the old wp-content directory > themes. copied 'mynewtheme' folder, where the theme i was working on is held, into the new fresh wp-content folder. then, went back to the admin, went to pages and add new. i get to the add new page and type in the title for the new page 'who we are' and wait for the yellow permalink structure bit below this box to appear so i can edit the way the permalink is displayed, but it doesn't appear. so anyway, i click publish and then i get a blank screen AGAIN! i click back and the page 'who we are' is in the list. i try to trash it, then blank page! click refresh on the browser, get a message saying 'error in moving to trash'.
can you assist me any further?
i've spent two weeks building the site so far and everything was going so well...
- and point me to how i would repair my database if needed?
many many thanks.