Greetings, anonymous-59cf7d.
Since you're having issues with connecting our program via Barclays Mybusinessworks, it would be best to seek further assistance from our Intuit Developers. I suggest posting your question on their website to acquire answers from the experts.
I'm attaching the direct link on your behalf: https://developer.intuit.com.
Please get back to me if you have any questions with using QuickBooks, and I'll be sure to get back to you.