Hi,
I have an ecommerce site and email template.
on order this email is sent out: E-commerce - Order notification to customer,
and Im trying to add a custom macros w a parameter to the template.
I am getting an error:

this is how the doe looks:

{#getVat|%TOTALPRICE%#}

+ actual custom macros

 match = false;
        string result = expression;


        switch (expression.ToLower())
        {
           

            case "getvat":
                match = true;
                double vat1 = 1.16;
                double fullPrice1 = Convert.ToDouble(temp[1].Split('&')[0]);
                double priceNoVat1 = fullPrice1 / vat1;
                result = String.Format("{0:0.##}", (fullPrice1 - priceNoVat1)); // (fullPrice1 - priceNoVat1).ToString();
                break;
        }

        return result;

When i run this locally and debug I that all is good, but on live site I get the error:

[FormatException: Input string was not in a correct format.]
   System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +10161091
   System.Number.ParseDouble(String value, NumberStyles options, NumberFormatInfo numfmt) +204
  
 System.Double.Parse(String s, NumberStyles style, NumberFormatInfo info) +10148255
   System.Convert.ToDouble(String value) +48
   CMSCustom.ResolveCustomMacro(MacroResolver sender, String expression, Boolean& match) +279
   CMS.GlobalHelper.MacroResolver.MacroMatch(Match m, Boolean& match) +2293
   CMS.GlobalHelper.MacroResolver.MacroMatch(Match m) +28
   System.Text.RegularExpressions.RegexReplacement.Replace(MatchEvaluator evaluator, Regex regex, String input, Int32 count, Int32 startat) +244
   System.Text.RegularExpressions.Regex.Replace(String input, MatchEvaluator evaluator) +84
   CMS.GlobalHelper.MacroResolver.ResolveMacros(String inputText, Int32 recursionLevel) +723
   CMS.CMSEcommerce.OrderInfoProvider.SendOrderNotificationToCustomer(ShoppingCartInfo cartObj) +406
   CMSModules_Ecommerce_Controls_ShoppingCartPreview.ProcessStep() in
 c:\inetpub\wwwroot\stop\Extensions\CMSModules\Ecommerce\Controls\ShoppingCart\ShoppingCartPreview.ascx.cs:327
   CMS.EcommerceProvider.ShoppingCart.ButtonNextClickAction() +62
   CMSModules_Ecommerce_Controls_ShoppingCartControl.btnNext_Click(Object sender, EventArgs e) +235
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +115
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +140
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +29
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2981

When I changed the macros code to just return whatever the parameter is that it received, I got this:

%TOTALPRICE%

Any ideas why isn't working on live?
All files are in sync just like local?
Could I be missing some setting?server?

THANKS :)