PayPal Error 10001

On my first post - http://dianebourque.com/ecole/2013/03/17/comment-bloquer-une-application-dans-votre-compte-personnel-facebook/ - I get this error when we click on purchase:

There was a problem connecting to PayPal to setup your purchase. Please try again.

10001 – Internal Error – Timeout processing request

I know it's a PayPal error but do you have any ideas on how I can correct this? Thanks.