Web Connector 3181 Error

This is usually cause by QuickBooks having to many records for customers or orders/receipts. Only the Enterprise version of QuickBooks will allow you to have unlimited number of these. Please see this link for further information -
And also this one -

Once you have fixed this issue, you will need to refer to this page to re-download information - http://www.teapplix.com/help/?page_id=801