Error Message 3005, 601

[webgrant2012]

While I'm trying to complete my purchase I've been getting Error Message:

"We are sorry, we are experiencing temporary difficulties. Please try again later. If this error occurred while making a payment, avoid duplicate payments by checking your Account Overview before resending a payment.
For some browsers, this problem can be resolved by clearing or deleting cookies.
Message 3005"

Using my phone I have a paypal error 601.

Would you help me to fix it? I have used Chrome, Opera, IE from 2 different PC's.