Has anyone used the stored procedure "sp_help_job" from MS SQL Server 2000 from ASP? I've been able to successfully execute it from Query Analyzer, but when it runs from ASP, I receive the following error:

Microsoft OLE DB Provider for SQL Server error '80040e07' 
Error converting data type nvarchar to uniqueidentifier.
This is a code snippet:
Dim objDataCmd_TD_JOB, objconn_TD_JOB, objrs_TD_JOB
Set objDataCmd_TD_JOB = server.CreateObject("ADODB.Command")
Set objconn_TD_JOB = server.CreateObject ("ADODB.connection")
Set objrs_TD_JOB = server.CreateObject("ADODB.Recordset")

objconn_TD_JOB.Open strDBConn_TD_JOB
objDataCmd_TD_JOB.ActiveConnection = objconn_TD_JOB

objDataCmd_TD_JOB.Parameters.Append objDataCmd_TD_JOB.CreateParameter("@job_name", adVarWChar, adParamInput, 128, "Job_Name")

sSQL = "sp_help_job"
objDataCmd_TD_JOB.CommandText = sSQL
set objrs_TD_JOB=objDataCmd_TD_JOB.Execute ( , ,adCmdStoredProc)

Set objrs_TD_JOB = Nothing
Set objconn_TD_JOB = Nothing
Set objDataCmd_TD_JOB = Nothing
"Job_Name" would be the name of my job
strDBConn_TD_JOB is defined elsewhere as my connection string

Any ideas?