OK, so here it goes (easier to create a new example)... see if that works for you:
1) Create the Query.
SELECT @SELECT:DIM:USER_DEF:IMPLIED:FP:FP.ID:PLAN_ID@
,@SELECT:DIM_PROP:USER_DEF:IMPLIED:FP:FP.NAME:PLAN_NAME@
,@SELECT:DIM_PROP:USER_DEF:IMPLIED:FP:FP.CODE:PLAN_CODE@
,@SELECT:DIM_PROP:USER_DEF:IMPLIED:FP:I.NAME:INV_NAME@
,@SELECT:DIM_PROP:USER_DEF:IMPLIED:FP:I.CODE:INV_CODE@
,@SELECT:DIM_PROP:USER_DEF:IMPLIED:FP:I.ID:INV_ID@
,@SELECT:DIM_PROP:USER_DEF:IMPLIED:FP:'/niku/nu#action\:revmgr.costplandetailList&id='||I.ID||'&odf_return_to=npt.overview&plan_id='||FP.ID:LINK@
FROM INV_INVESTMENTS I
INNER JOIN FIN_PLANS FP
on FP.OBJECT_CODE = 'project'
and FP.OBJECT_ID = I.ID
and FP.PLAN_TYPE_CODE='FORECAST'
WHERE @FILTER@
2) Declare the Link on the Query - notice the action is "URL Redirect to a Clarity Page" - you need to check whether you have that page in your system. If not, let me know.
Notice the "url" parameter will be your "LINK" attribute, the one you created in your query (in Bold Italic above).
3) This is the portlet
4) This is how you define the Cost Plan Link (do NOT mark Open as Pop-up):
Let me know if that's clearer
Alex