MU Class Failure - Key Field() not included

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Good afternoon,

I am hoping you may be able to assist, as the MLS has not been able to. Our information is below:

URL - http://huntsville.retsiq.com/contactl... Username - CLEARCAPITAL

The MLS recently added the Mulfi Family class field that we have not been able to access due to the following error.

"ERROR in step 1. MU. Key field () has not been included in the Search response from the server."

Would you be able to add in the key field to our feed?

Thank you,

Shirley