The code sample below (from http://www.salesforce.com/us/developer/docs/api/Content/sforce_api_calls_create.htm ) works, but if I add the line "account.AnnualRevenue = 11000.00;" and view the newly created account in SalesForce, the name and website appear but the AnnualRevenue, which is a double does not. In testing any string parameter I added to account (like phone) appeared on the Account tab while non strings (like number of employees which is an ) did not.  

private void createAccount()
{
   //Create an account object to send to the service
   Account account = new Account();

   //Set several properties
   account.Name = "Koka Kola";
   account.Website = "www.kokakola.com";

   // Add the account to an array of SObjects
   sObject[] records = new sObject[] {account};

   // Invoke the create call, passing in the account properties
   // and saving the results in a SaveResult object
   SaveResult[] saveResults = binding.create(records);

   // Access the new ID
   String newID = saveResults[0].id;
}