Sybase AseCommand Execute SQL string - stored-procedures

Question

I've found an interesting thing in Sybase AdoNet driver. I could not execute dynamics sql statements properly with it.
I have a very little stored procedure:
CREATE PROCEDURE
GetCustomerByName
#customerFirstName nvarchar(50),
#customerLastName nvarchar(50),
#intParameter int AS
/* Adaptive Server has expanded all '*' elements in the following statement */
SELECT
Customer.Id,
Customer.FirstName,
Customer.LastName
FROM
Customer
WHERE
FirstName = #customerFirstName
AND LastName = #customerLastName
I would like to execute dynamic sql statements against this stored procedure:
using (var aseConnection = new AseConnection(SybaseConnectionString))
using (var aseCommand = aseConnection.CreateCommand())
{
aseConnection.Open();
aseCommand.CommandText = #"
execute GetCustomerByName
#customerFirstName = ?,
#customerLastName = ?,
#intParameter = 1";
aseCommand.CommandType = CommandType.Text;
aseCommand.Parameters.Add(0, "John");
aseCommand.Parameters.Add(1, "Doe");
using (var dataReader = aseCommand.ExecuteReader())
{
while (dataReader.Read())
{
Console.WriteLine(
"Id: {0} - First Name: {1} - Last Name: {2}",
dataReader.GetInt32(0),
dataReader.GetString(1),
dataReader.GetString(2));
}
}
}
But unfortunately I get an exception:
Sybase.Data.AseClient.AseException was unhandled
HResult=-2146233087
Message=Must declare variable '#dr_ta0'.
Source=Sybase.AdoNet2.AseClient
StackTrace:
at Sybase.Data.AseClient1.AseCommand.CheckResult(Int32 res)
at Sybase.Data.AseClient1.AseCommand.Execute(CommandBehavior commandBehavior)
at Sybase.Data.AseClient1.AseCommand._ExecuteReader(CommandBehavior commandBehavior)
at Sybase.Data.AseClient1.AseCommand.ExecuteReader()
at Sybase.Data.AseClient.AseCommand.ExecuteReader()
at AseCommandTest.Program.Main(String[] args) in c:\Users\jkanczler\Documents\Visual Studio 2012\Projects\AseCommandTest\AseCommandTest\Program.cs:line 61
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException:
As I see Sybase does not support very well the parameter passing to an AseCommand. What's the best practice then to execute dynamic sql statements with AseCommand?