Crystal Reports Command object SQL statement with parameter

Message

   I have a report that uses a SQL Server stored procedure as the data source. The first parameter they enter is their company number (we have numerous clients using Lawson and access Crystal through LBI). The next parameter is the account number. I have a SQL statement written that gets distinct account numbers by company. When I create a Command object with the SQL statement, it doesn't allow me to use the company parameter.

SELECT DISTINCT GLC.ACCOUNT, GLC.ACCOUNT_DESC
FROM dbo.GLMASTER AS GLM
INNER JOIN DBO.GLCHARTDTL AS GLC 
ON GLM.CHART_NAME = GLC.CHART_NAME
AND GLM.ACCOUNT = GLC.ACCOUNT
WHERE GLM.COMPANY = {?Company}
ORDER BY GLC.ACCOUNT
When I do Add Command in Database Expert and add the SQL above and name the parameter and try to Add, it says "Failed to retrieve data from the datase. 
Details: ADO Error Code: 0x 
Source: Microsoft OLE DB Provider for SQL Server 
Description: No value given for one or more required parameters

Does anyone have a similar situation and a solution to this problem--either regarding my approach and error or a different approach to get the same thing?

Any input would be greatly appreciated!