[amibroker] Not Able to Convert TS Function in Amibroker

[roshan]

Hi,
 
    I Want to Convert Following TradeStation Funtion into Amibroker But NOt 
Able to get Same Result Can You Please tell Me Why It is Happeninig



Tradestation Code:

inputs: 
        PriceValue( numericseries ), 
        Len( numericsimple ) ;                                         

variables: 
        var0( 0 ) ;

if CurrentBar = 1 then 
        begin
        for Value1 = 0 to Len - 1 
                begin
                var0 = var0 + PriceValue[Value1] ;
                end ;
        end
else
        var0 = var0[1] + PriceValue - PriceValue[Len] ;

SummationOfValue = var0 ;

/////////////////////////////////////////////////////////////

Amibroker Code(Not Working): 

function SummationOfValue( PriceValue, Len ) 
{

var0= 0; 
Var2=Ref(PriceValue,-Len);

for (i=0;i<BarCount;i++)
{
if (i == 0 )
{

for (Value1 = 0; Value1<Len - 1;Value1++) 
   {
  if(Value1==0)
   {
    var0[i] =  PriceValue[Value1] ;
   }  
   else
   {
    var0[i] = var0[i] + PriceValue[Value1] ;

    }
    }
}
else
{
var0[i] = var0[i-1] + (PriceValue[i] - Var2[i]);
}
}
return Var0;
}

//////////////////////////////////////////////////////////

   Please Help Me In The Above Conversion As Soon as Possibe,

 Thanks in Advance