SAP Query is really not my strongest competence but reading the manual it says:
7.2.3 Using SAP Query Connector
It is strongly recommended to test the query in transaction SQ01 prior to testing it via QlikView. If the query prompts for variable input, create a variant of the query with pre-defined values for the variables.
Could it be that there is a prompt for Notification Type? Could you configure a SAP Query without that promt? / Mats