Database adapter returns result different to SQL

Hi,
I created Database adapter for master-detail select:
SELECT DISTINCT t1.INSTANCE_ID, t1.SERVICE_ID, t0.CONFIGURATION_KEY, t0.CONFIGURATION_VALUE, t0.INSTANCE_ID FROM SRVINSTANCECONF t0, SERVICE_INSTANCE t1
WHERE (((t0.CONFIGURATION_KEY = #key) AND (t1.SERVICE_ID = #serviceID)) AND (t0.INSTANCE_ID = t1.INSTANCE_ID))
This select in our database return 2 rows. This is what I want.
But when I call webservice with database adapter this returns 2 master tags but all detail tags. It looks like t0.CONFIGURATION_KEY = #key where condition is not taken into SQL statement.
Thanks

pk of detail is t0.CONFIGURATION_VALUE, t0.INSTANCE and row are not duplicated. Problem is that rows are not filtered.
There are all rows with SERVICE_ID = 2
INSTANCE_ID, SERVICE_ID, CONFIGURATION_KEY
3,2,"instanceType"
3,2,"keyName"
3,2,"device"
3,2,"tebs"
3,2,"size"
3,2,"imageId"
3,2,"securityGroups"
3,2,"dir"
2,2,"imageId"
Adapter returns for CONFIGURATION_KEY = "imageId" AND SERVICE_ID = 2 this XML
          <top:ServiceInstanceCollection xmlns:top="http://xmlns.oracle.com/pcbpel/adapter/db/top/InstancesConfigurationAdapter">
               <top:ServiceInstance>
                    <top:instanceId>2</top:instanceId>
                    <top:serviceId>2</top:serviceId>
                    <top:srvinstanceconfCollection>
                         <top:Srvinstanceconf>
                              <top:configurationKey>imageId</top:configurationKey>
                         </top:Srvinstanceconf>
                    </top:srvinstanceconfCollection>
               </top:ServiceInstance>
               <top:ServiceInstance>
                    <top:instanceId>3</top:instanceId>
                    <top:serviceId>2</top:serviceId>
                    <top:srvinstanceconfCollection>
                         <top:Srvinstanceconf>
                              <top:configurationKey>instanceType</top:configurationKey>
                         </top:Srvinstanceconf>
                         <top:Srvinstanceconf>
                              <top:configurationKey>securityGroups</top:configurationKey>
                         </top:Srvinstanceconf>
                         <top:Srvinstanceconf>
                              <top:configurationKey>size</top:configurationKey>
                         </top:Srvinstanceconf>
                         <top:Srvinstanceconf>
                              <top:configurationKey>dir</top:configurationKey>
                         </top:Srvinstanceconf>
                         <top:Srvinstanceconf>
                              <top:configurationKey>imageId</top:configurationKey>
                         </top:Srvinstanceconf>
                         <top:Srvinstanceconf>
                              <top:configurationKey>tebs</top:configurationKey>
                         </top:Srvinstanceconf>
                         <top:Srvinstanceconf>
                              <top:configurationKey>keyName</top:configurationKey>
                         </top:Srvinstanceconf>
                         <top:Srvinstanceconf>
                              <top:configurationKey>device</top:configurationKey>
                         </top:Srvinstanceconf>
                    </top:srvinstanceconfCollection>
               </top:ServiceInstance>
          </top:ServiceInstanceCollection>

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