Aveksa Webservice Error: 412 The change request could not be created. The given business source is not configured as source

I am trying to use Aveksa webservice command "CreateChangeReqeust" to SynchronizePassword.

while using this i am getting the below error.,

412 The change request could not be created. The given business source is not configured as source  SynchronizePassword <userId> <password> Query String=cmd=createChangeRequest&token=ws31aeb9bdb40ee71b3a:a877881:14fe399301d:7d3e0.968057341256027

Payload i am using is

<Changes>

<AccountChange>

<Operation>SynchronizePassword</Operation>

<User>user</User>

<BusinessSource>Active Directory</BusinessSource>

<Password>Password01</Password>

</AccountChange>

</Changes>

Any idea why i am getting this error.?