Dreamweaver+access做挂号系统提交表单出错？

Question

： Microsoft OLE DB Provider for ODBC Drivers 错误 '80040e21' [Microsoft][ODBC Microsoft Access 驱动程序]非法的精确度数值 /test3.asp，行 31
我做了一个挂号系统，本身已经完善好了。想再加一个开处方的功能，可提交表单时报如上错误，我在百度上看是数据类型的问题我改了还是不行

<%
If (CStr(Request("MM_insert")) = "form1") Then
If (Not MM_abortEdit) Then
' execute the insert
Dim MM_editCmd

Set MM_editCmd = Server.CreateObject ("ADODB.Command")
MM_editCmd.ActiveConnection = MM_testDatabase_STRING
MM_editCmd.CommandText = "INSERT INTO chufang (pname, casereport, medicine, yf, yl, yizhu) VALUES (?, ?, ?, ?, ?, ?)" 
MM_editCmd.Prepared = true
MM_editCmd.Parameters.Append MM_editCmd.CreateParameter("param1", 202, 1, -1, Request.Form("pname")) ' adVarWChar
MM_editCmd.Parameters.Append MM_editCmd.CreateParameter("param2", 202, 1, -1, Request.Form("casereport")) ' adVarWChar
MM_editCmd.Parameters.Append MM_editCmd.CreateParameter("param3", 202, 1, -1, Request.Form("medicine")) ' adVarWChar
MM_editCmd.Parameters.Append MM_editCmd.CreateParameter("param4", 202, 1, -1, Request.Form("yf")) ' adVarWChar
MM_editCmd.Parameters.Append MM_editCmd.CreateParameter("param5", 202, 1, -1, Request.Form("yl")) ' adVarWChar
MM_editCmd.Parameters.Append MM_editCmd.CreateParameter("param6", 202, 1, -1, Request.Form("yizhu")) ' adVarWChar
MM_editCmd.Execute
MM_editCmd.ActiveConnection.Close

' append the query string to the redirect URL
Dim MM_editRedirectUrl
MM_editRedirectUrl = "cfdan.asp"
If (Request.QueryString <> "") Then
  If (InStr(1, MM_editRedirectUrl, "?", vbTextCompare) = 0) Then
    MM_editRedirectUrl = MM_editRedirectUrl & "?" & Request.QueryString
  Else
    MM_editRedirectUrl = MM_editRedirectUrl & "&" & Request.QueryString
  End If
End If
Response.Redirect(MM_editRedirectUrl)

End If
End If
%>