HOW I CAN GET RELATABLE DATA PLS HELP

Respected Experts
i am trying to fetch the outstanding bill from related ledger.
but it showin all the bills on each ledger name.

Please help.......as my collection given below....

[Part:TRADING PART]
Line:OSNAME
Repeat:OSNAME:COLLOSNAME
Scroll : Vertical
Common Border : Yes

[Line: OSNAME]
Field: OSNAME

Explode: DrillOSLIST

[PartrillOSLIST]
Line:OSREF
REPEAT:OSREF:COLLOSBILL

[LINE:OSREF]
Field: OSBILLDT, OSREF, OSOP

[FIELD:OSREF]
Use : NameField
Set As: $Name


[Field:OSBILLDT]
Use : Uni Date Field
Set As : $Billdate

[Field:OSOP]
Use : Amount Field
Set As : $OpeningBalance
Format : "DrCr"

[FIELD:OSNAME]

Use: NAME

Set as: $NAME
Width : 45
Align: CentER

[Collection:COLLOSNAME]
Type: LEDGER
Fetch: NAME
Belongs To: Yes


[Collection:COLLOSBILL]
Type: BILL
Fetch: NAME,Billdate,OpeningBalance
Belongs To: Yes

 

Set as : $$Localestring:$LedgerName
Set as : $Closing balance