Does Dataset-XML validation for ADaM work in V1.5?

Hi, I tried to validate an ADaM compliant dataset with the using the Dataset-XML source format but got the following error: SD0062 : Incompatible data source. Does that mean that XML is not recognized? I tried with SDTM domains provided with the example package of DS-XML and it seems to work just fine. I wonder what might generate this error. I also attached the coresponding Define.xml file. Thanks Pierre