Hi all, 

I have a production salesforce trial account and i'm trying to connect to BO Data Services using data services's adapter.

All the requirement were met (Proxy requirement met ; password =account pass+security token ; Verisign Certificate added ; TSL1.1 and TSL1.2 enabled...etc.)  but i'm still getting the following error when i try to connect DataServices to Salesfoce : 

" ​There was a communication error when talking to Salesforce.com: org.apache.axis2.databinding.ADBException: Unexpected subelement {urn:fault.partner.soap.sforce.com}upgradeURL 1/31/17 4:26:20 PM Thread[Thread-25,5,main] Fault-tolerance-login-failed : There was a communication error when talking to Salesforce.com: org.apache.axis2.databinding.ADBException: Unexpected subelement {urn:fault.partner.soap.sforce.com}upgradeURL "

I tried all the following URLs but i'm still getting the same error: 
https://salesforce.com/services/Soap/u/21.0 (URL by default in Data Services)
https://login.salesforce.com/services/Soap/u/38.0
https://login.salesforce.com/services/Soap/u/21.0 
https://salesforce.com/services/Soap/u/38.0

Do you have any ideas about how to resolve this -i'm stuck with this error for about a week :'( - ?

Many thanks by advance, 
Ezzar