Error getting articles. Please check Shop-ID, API and secret.

Hello,
for strat, excuse my english, i’m really bad =/

I had install the WP spreadplugin yesterday, and it had work fine, but today i have this message :
“Error getting articles. Please check Shop-ID, API and secret.”

i don’t know what’s wrong because my shop api and shop secret come’s from spreadshirt and it’s worked yesterday =/

i use this code in my page to include my shop :
[spreadplugin shop_id=”” shop_limit=”” shop_locale=”” shop_source=”fr_FR” shop_category=”” shop_api=”” shop_secret=””]

http://wordpress.org/extend/plugins/wp-spreadplugin/