DB2 Recursion Bill of Materials in SSRS issue with joining add'l tables

Well - I still have a logic error on my totals - and it's running excruciatingly slow... but, I think I'm over the hump for now.

Explaining it here and having Drew ask a question helped a lot.

Here's the current version I'm working with - it's not working on the inventory totals - but is working from a no errors getting thrown by DB2 or SSRS.

Thank you!

WITH RPL (BPROD, BCHLD, BQREQ, LOPB, LIALOC) AS
(
	SELECT ROOT.BPROD, ROOT.BCHLD, ROOT.BQREQ, ILI.LOPB, ILI.LIALOC
	FROM BPCSFILE64.MBM ROOT, BPCSFILE64.ILI ILI
	WHERE ROOT.BPROD = ?
	AND ROOT.BCHLD = ILI.LPROD
UNION ALL
	SELECT PARENT.BPROD, CHILD.BCHLD, PARENT.BQREQ*CHILD.BQREQ, ILI.LOPB, ILI.LIALOC
	FROM RPL PARENT, BPCSFILE64.MBM CHILD, BPCSFILE64.ILI ILI
	WHERE PARENT.BCHLD = CHILD.BPROD
	AND CHILD.BCHLD = ILI.LPROD
)
	SELECT BPROD, BCHLD,
	(SUM(BQREQ) * ?) AS "Total QTY Used",
	SUM(LOPB) AS "Total Opening Balance",
	SUM(LIALOC) AS "Total Allocations"
	FROM RPL
	GROUP BY BPROD, BCHLD
	ORDER BY BPROD, BCHLD