AbleCommerce Shopping Cart Software

Hello, we are attempting to setup Ables integration with Avalara on v7.0.7 and am running into some difficulty.
The default URL's that Able has loaded for the tax and address services are:
https://development.avalara.net/Tax/TaxSvc.asmx and
https://development.avalara.net/Address/AddressSvc.asmx

Checking the logs, I see the following errors being recorded (summarized):
"AvaTax threw an exception while calculating tax for basket 24: There was no endpoint listening at https://development.avalara.net/Tax/TaxSvc.asmx that could accept the message. This is often caused by an incorrect address or SOAP action."

So Per the email from Avalara from sign-up, and discussion with Avalara chat support, I changed these both to:
https://avatax.avalara.net/

Same result as before. So my question is, has anyone successfully connected to Avalara and can you provide me with the correct URL's to use since I can't find anything via searching the forums here or at Avalara.

Thanks in advance!!!

Update on this, we had to unblock the port so now traffic is flowing to Avalara, but now a different message is being returned:


ERROR 2011-11-01 16:22:12,169 1243321ms Object Calculate - AvaTax threw an exception while calculating tax for basket 24: The remote server returned an unexpected response: (405) Method Not Allowed.
System.ServiceModel.ProtocolException: The remote server returned an unexpected response: (405) Method Not Allowed. ---> System.Net.WebException: The remote server returned an error: (405) Method Not Allowed.
at System.Net.HttpWebRequest.GetResponse()
at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
--- End of inner exception stack trace ---