SQL Query quesiton: Identify the currency of the foreign country with the highest number of orders.

I tried

select c.CurrencyCode,c.Name from CurrencyRate cr join (select CurrencyRateID,count(*) from SalesOrderHeader group by CurrencyRateID having count(*)= (select max(cnt) from(SELECT CurrencyRateID, count(SalesOrderID) as cnt from SalesOrderHeader group by CurrencyRateID)))b on cr.CurrencyRateID=b.CurrencyRateID join Currency c on cr.ToCurrencyCode=c.CurrencyCode;

But it did not work.

schema link: https://i.stack.imgur.com/LMu4W.gif

AdventureWorks 2008 OLTP Schema Sales HumanResourccs Person Production Schemas Sales Purchasing Person Production AdventureWorks 2008 OLTP Schema Sales HumanResourccs Person Production Schemas Sales Purchasing Person Production