Error in AML

I'm trying to run relationship grid from my itemtype "MIN_DELIVERED_COMPONENT" MIN_DELIVERED_COMPONENT item_number = 'CNDF269273' MIN_RMA_PARTS item_number = 'CNDF269273' source_id = '707989C8059F407283DFB1446BE2E144' MIN_RMA id = '707989C8059F407283DFB1446BE2E144'   When I run this AML I don't get any results back, but if change the "id></id>" section to <id>707989C8059F407283DFB1446BE2E144</id> its works. I checked the select statement in SQL studio and it returns "707989C8059F407283DFB1446BE2E144" <AML> <Item type="MIN_RMA" action="get" select = "rma_no"> <id> (SELECT innovator.MIN_RMA.id FROM  innovator.MIN_DELIVERED_COMPONENT INNER JOIN innovator.MIN_RMA_PARTS ON innovator.MIN_DELIVERED_COMPONENT.item_number = innovator.CNDF269273.item_number INNER JOIN innovator.MIN_RMA ON innovator.MIN_RMA_PARTS.source_id = innovator.MIN_RMA.id WHERE (innovator.MIN_DELIVERED_COMPONENT.item_number = 'CNDF269273')) </id> </Item> </AML>