Authentication error 409 - DIGEST-MD5


I’m trying to authenticate spark + presence server (CISCO), but I’m facing some issues.

Basically, it seems my client authentication type is PLAIN, but the server can’t authenticate because it uses DIGEST-MD5.

The log shows an error which the code is 409 (What does it mean?).

How do I change the authentication type in Spark client in order to match with the server’s authentication and solve this problem?

Some pictures with the error log are attached.

Thanks in advance,