Moved server and admin my store error

[PhillipHarrison]

Hello,

Moved a zencart shop from a shared hosting onto a dedicated server. Took some doing to be honest but all looks good apart from 1 thing

In the configuration My Store, the county field is blank so that page has an error:

Warning: call_user_func(get_country_name) [function.call-user-func]: First argument is expected to be a valid callback in /var/www/****.com/admin/includes/functions/general.php on line 2986

Warning: call_user_func(cfg_get_zone_name) [function.call-user-func]: First argument is expected to be a valid callback in /var/www/****.com/admin/includes/functions/general.php on line 2986

Field in the database for country and zone seem fine. Any ideas?

[edit]
Also found that when adding a new item to the new place, when you try to look at that item on the shop front it brings up a blank page.