As I have purchased API , I am trying to send bet using fairlay sample client API (C# language) , I am using changeOrders function and getting error "XError:Wrong Signature" .

Recently , I have used following details and called function named "changeOrders" :

I am confused in Amount and Price so i have make same value = 2 for both.

API ID = My API ID

MarketID = 112543146565
RunnerID = 1
OrderId = -1
Amount = 2
Price = 2
Sub = "Edward Corrie vs. Dominik Koepfer"
Type = UnmatchedOrder.Type.MAKERTAKER
Boa = 1
Mct = 0

Is the API not working for C# language ?
Can anyone help me ?