Unable to Retrive Value of Udf Created in Voucher

Pls Help Me , Defined a UDF 'Marketedby' in Voucher and want to add value of this filed in Ledger Report but unable to retrieve value of this field

my code :

[System: UDF]
Marketedby : String : 1200

; Defined this filed in Voucher
[Field: Marketedby]

Use : Ledger Name Field
Table : ExcReceiverDtlsColl,none
Delete : Storage
add : Storage : Marketedby
Set Always : yes
Show Table : Always
Width : 21

;-------------------Defined in Ledger Report-----------------------------
[#Line: DSP VchAccTitles]
Option : SignDetailsTitle

[!Line: SignDetailsTitle]
Add: Right Field:BeforeSP VchTypeTitle:Medium Prompt
Local: Field: Medium Prompt : Set as: "Marketed By"
Local: Field: Medium Prompt : Align : Left
Local: Field: Medium Prompt :Width : 13

[#Line: DSP VchDetail]

Option : DSPMarketedby

[!Line: DSPMarketedby]
Add:Right Fields:BeforeSP VchTypeSPMarketedby


[Field: DSPMarketedby]
Use : name field

Set Always : Yes

Set As :$marketedby
Style : Normal
Align : Left
Width : 13

 

pls elaborat