mi dice
Microsoft OLE DB Provider for ODBC Drivers error '80040e07'

[Microsoft][ODBC Microsoft Access Driver] Data type mismatch in criteria expression.

/sito2/agenda.asp, line 148


questa è la stampata della query

SELECT * FROM agenda WHERE Data >='' ORDER by Data


questo è lo script

codice:
function prepara_data(gg,mm,aaaa)
data= gg & "/" & mm & "/" & aaaa
response.Write data
end function
call prepara_data(datePart("d",now()), datePart("m",now()), datePart("yyyy",now()))

Set Conn = Server.CreateObject("ADODB.Connection")
Conn.Open "DRIVER={Microsoft Access Driver (*.mdb)};" &_
"DBQ="& Server.MapPath("/mdb-database/auriga.mdb")
sql = "SELECT * FROM agenda WHERE Data >='" & data & "' ORDER by Data"