error with createparameter code

[dminich]

I'm trying to add values from a form to an Oracle database. Here is my asp code.

<%
Dim Conn
set conn = server.CreateObject("ADODB.Connection")
conn.ConnectionString = "Data Source=InternApp;User ID=Intern;Password=intern"
conn.open

set comm = server.CreateObject("ADODB.Command")
set comm.ActiveConnection = conn
comm.commandtype=4

comm.commandtext = "insert_test"

set param = comm.parameters
param.append comm.createparameter("dminich",adVarChar,adParamInput)
comm("dminich") = "tyler"
'param.append comm.createparameter("dminich",3,1)
'comm("dminich") = 852741963
%>

I receive the following error
* Error Type:
ADODB.Command (0x800A0BB9)
Arguments are of the wrong type, are out of acceptable range, or are in conflict with one another.
/InternCtr/InternshipApplication.asp, line 15

Line 15 is param.append comm.createparameter("dminich",adVarChar,adParamInput)

The odd part is the code works fine when I use param.append comm.createparameter("dminich",3,1)
comm("dminich") = 852741963

and comment out the other two lines. What am I doing wrong or missing?