Unable to explode ledger entries under inventory entries

I had a report which will be displayed by a button click from sales voucher
the report will contain the details about the current sales voucher, which needs to be exported
in the report, I had a line that repeats inventory entries
the same line will explode a part for repeating ledger entries
But I am unable to get ledger entries exploded under inventory entries

Here is what I done:

Code:

[Collection:EVListofInv]
    Source Collection:...
    Walk:InventoryEntries
    Compute:StockItemName:$StockItemName
    Compute:Amount:$Amount
   
   
[Collection:EvListOfLed]
    Source Collection:...
    Walk:LedgerEntries
    Compute:LedgerName:$LedgerName
    Compute:Amount:$Amount


;select $VoucherNumber from ListOfSalesvch

[#Form:Voucher]
    Add:Button:EVsalesRpt

[Button:EVsalesRpt]
    Title:"EV Sales Report"
    Key:ALT+T
    Action:Display:EvSalesReport
    Inactive:NOT @@Issales

[Report:EvSalesReport]
    Form:EvSalesReport
    Title:"Sales Report"
   
[Form:EvSalesReport]
    Part:EvInvEntries
    Width:100% page
    Height:100% page

[Part:EvInvEntries]
    Line:EvInvEntries
    Repeat:EvInvEntries:EVListofInv
   
[Line:EvInvEntries]
    Fields:Evfld4,Evfld5
    Explode:EvLedEntries
   
[Field:Evfld4]
    Use:Name Field
    Set as:$StockItemName
   
[Field:Evfld5]
    Use:Amount Field
    Set as:$Amount
   
[Part:EvLedEntries]
    Line:EvLedEntries
    Repeat:EvLedEntries:EvListOfLed
   
[Line:EvLedEntries]
    Fields:Evfld6,Evfld7
   
[Field:Evfld6]
    Use:NameField
    Set as:$LedgerName
   
[Field:Evfld7]
    Use:Amount Field
    Set as:$Amount
   

Any suggestions will be helpfull.

 

But I want only the current voucher which user is entering.
Is there any way to get only the current voucher collection?

 

Replace
Source Collection : ...
to
Source Collection : Default

for both the collection