[plugin fotobook] Fotobook import error

I am using Fotobook Version 3.2.1 and WordPress Version 3.0.1.

I have had Fotobook running fine for 6 months now, but when i just went to import a new album, I was unable to do so and I received the message below. Can someone help with how to fix this error?

Fatal error: Uncaught exception \’FB_FacebookRestClientException\’ with message \’Session key invalid or no longer valid\’ in /nfs/c02/h10/mnt/18718/domains/xxx/html/wp-content/plugins/fotobook/facebook-platform/facebookapi_php5_restlib.php:3003 Stack trace: #0 /nfs/c02/h10/mnt/18718/domains/xxx/html/wp-content/plugins/fotobook/facebook-platform/facebookapi_php5_restlib.php(1608): FB_FacebookRestClient->call_method(\’facebook.photos…\’, Array) #1 /nfs/c02/h10/mnt/18718/domains/xxx/html/wp-content/plugins/fotobook/fotobook.php(258): FB_FacebookRestClient->photos_getAlbums(\’100001224067276\’, NULL) #2 /nfs/c02/h10/mnt/18718/domains/xxx/html/wp-content/plugins/fotobook/fotobook.php(664): FacebookAPI->update_albums() #3 [internal function]: fb_ajax_handler(\’\’) #4 /nfs/c02/h10/mnt/18718/domains/xxx/html/wp-includes/plugin.php(395): call_user_func_array(\’fb_ajax_handler\’, Array) #5 /nfs/c02/h10/mnt/18718/domains/xxx/html/wp-admin/admin-ajax.php in /nfs/c02/h10/mnt/18718/domains/xxx/html/wp-content/plugins/fotobook/facebook-platform/facebookapi_php5_restlib.php on line 3003

Thanks in advance.