Error When Using SP In Data Flow

I want to execute a stored procedure in an OLE DB source in a Data Flow Task.

The stored procedure has a parameter.

When I put in an SQL command as :

EXEC sp_readcustomers 1

(thus passing 1 as the parameter value I can use the Preview button and I get a list of columns being returned.

The data flow task should run inside a ForEach Loop where I assign the value of an ADO resultset to a variable and it is this variable I want to pass to the SP :

EXEC sp_readcustomers ?

In the Parameter mapping I then name the parameter @par_company_id (which is the exact same name as in the SP) and map it to the variable var_company_id.

@par_company_id has been declared as int, var_company_id as Int16

When I now try to Parse or Preview the query from the OLE DB Source Edit window I get the following errors :

Parse : Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

Preview : No value given for one or more required parameters (Microsoft SQL Native Client)



I have already installed SQL 2005 SP2 and VS2005 SP1.



I have tried everything I know, please help ?!?!