Filter Button Not working

Dear Amit Sir,

My Filter button is not working. Can you help me sir.



;;;; Making a AMC Register ;;;;;

[Report : AMC Register]

Form : AMC Register
Title : "A M C - R E G I S T E R"
Set : SVFromDate : $$FinyearBeg:##SVCurrentDate:$Startingfrom:Company:##SVCurrentCompany
Set : SVToDate : ##SVCurrentDate
Set : AMCTypeVar : ""

[Form : AMC Register]
Part : AMC_Heading,AMC_Reg_Main
Button : Change Period
Button : AMC Type
Height :100% page
Width :100% page

[Part : AMC_Heading]
Line : AMC_Reg__Heading, AMC_Reg_Period
Common Border : Yes
[Line : AMC_Reg__Heading]
Field : AMC_Reg__Heading

[Field : AMC_Reg__Heading]
Set as : "AMC REGISTER"
Color : Blue
Style : Large Bold
Align : Center
Full Width : Yes

[Line : AMC_Reg_Period]
Field : AMC_Reg_Period

[Field : AMC_Reg_Period]

Set As : " From " + $$String:##SVFromDate + " To " + $$string:##SVToDate

Color : Blue
Style : Large Bold
Align : Center
Full Width : Yes

[Part : AMC_Reg_Main]
Line : AMC_Reg_Title, AMC_Reg_Details
Repeat : AMC_Reg_Details : AMC_Reg_Coll
Scroll : Vertical

[Line : AMC_Reg_Title]

Use : AMC_Reg_Details

Local : Field : Default : Type : String
Local : Field : Default : Style : Tiny Bold ;Header Title
Local : Field : Default : Color : Blue
Local : Field : Default : Line : 2
Local : Field : Default : Align : Center

Local : Field : AMCBillNo : Info : "Bill No."
Local : Field : AMCPartyName : Info : "Party Name"
Local : Field : PartyMobile : Info : "Mobile No "
Local : Field : ContractType : Info : "Contract Type"
Local : Field : R_AMCFrom : Info : "From Date"
Local : Field : R_AMCTo : Info : "Expires On"
Local : Field : R_AMC_NextDue : Info : "Contract Next Due Date"
Local : Field : AMCAmount : Info : "Contract Amount"
Local : Field : Cont_Status : Info : "Status"
Local : Field : Pmt_Cont_Type : Info : "Payment Contract Mode"

Space Bottom : 1
Border : Flush Totals

[Line : AMC_Reg_Details]

Field : AMCBillNo, AMCPartyName, PartyMobile, ContractType, R_AMCFrom, R_AMCTo, R_AMC_NextDue, AMCAmount, Cont_Status, Pmt_Cont_Type, DSPVCHMASTERIDNO
Option : AlterVchOnEnter : Yes

[Field : AMCBillNo]
Use : Name Field
Set as : $Vouchernumber
Set Always : Yes
Align : Center
Width : 10

[Field : AMCPartyName]
Use : Name Field
Set as : $BasicBuyerName
Set Always : Yes
Align : Center
Width : 20

[Field : PartyMobile]
Use : Name Field
Set as : $Ledgermobile:Ledger:$partyLedgerName
Set Always : Yes
Align : Center
Width : 10

[Field : ContractType]
Use : Name Field
Set as : $AMCTYPE
Set Always : Yes
Align : Center
Width : 12

[Field : R_AMCFrom]
Use : Short Date Field
Set as : $AMCFROM
Set Always : Yes
Align : Center
Width:10

[Field : R_AMCTo]
Use : Short Date Field
Set as : $AMCTo
Set Always : Yes
Align : Center
Width : 10

[Field : R_AMC_NextDue]
Use : Short Date Field
Set as : $AMCNEXTDUE
Set Always : Yes
Align : Center
Width : 10

[Field : AMCAmount]
Use : Name Field
Set as : $TOTCONTAMT
Set Always : Yes
Align : Center
Width : 15

[Field : Cont_Status]
Use : Name Field
Set as : $AMCSTATUS
Set Always : Yes
Align : Center
Width : 6

[Field : Pmt_Cont_Type]
Use : Name Field
Set as : $AMCPMTTYPE
Set Always : Yes
Align : Center
Width : 12

[Collection : AMC_Reg_Coll]

Type : Vouchers
Fetch : Date,Amount,VoucherTypeName,LedgerName,PArtyLedgerName,VoucherNumber, BasicBuyerName, AllLedgerEntries
Filter : AMCSalesVouchers
Filter : AMCTypeFilter2

;;; Filter Button Creation ;;;;;;

[Button : AMC Type]

Title : $$LocaleString:"AMC TYPE"
Key : Alt+T
Action : Execute : Change_AMC_Type

[Report : Change_AMC_Type]
Form : AMC_Filter
Set : AMCTypeVar=""

[Form : AMC_Filter]
Part : AMC_Filter
No Confirmation : Yes

[Part : AMC_Filter]
Line : AMC_Filter

[Line : AMC_Filter]
Field : Medium Prompt, AMC_Filter
Local : Field : Medium Prompt : Info : "Select AMC Type"
Local : Field : Medium Prompt : Align : Center

[Field : AMC_Filter]
Table : AMC Type
ShowTable : Always
Use : Name Field
Variable : AMCTypeVar
Modifies : AMCTypeVar
Width:20

[Variable : AMCTypeVar]
Type : String

[System : Variable]
AMCTypeVar : ""

[System : Formulae]

AMCSalesVouchers : $VoucherTypeName="AMC GST Invoice"

AMCTypeFilter2 : $AMCTYPE=@@AMCTypeFilter
AMCTypeFilter : if ##AMCTypeVar="" OR $$IsEmpty:##AMCTypeVar then $AMCTYPE else ##AMCTypeVar

 

Not working Sir.