PreparedStatement not working with ADO

users
#1

Hallo,
we connect to a MS SQL server using this connectionstring:
"sdbc:ado:Provider=SQLOLEDB.1;Persist Security Info=True;Initial Catalog=DobbitMulti;Data Source=000.000.000.000"
  as URL for a "com.sun.star.sdbc.DriverManager"
as return we optain a "com.sun.star.sdbcx.AConnection"

who permit us to make normal statements to MS SQL tables.

but a simple "prepared statement" like:

insertSQL = "INSERT INTO DobbitMulti.pmgMiuCode(basis, nummer ,taal) VALUES(?,?,?)"
             oInsStmt = oLCPConn.PrepareStatement(insertSQL)
             oINsStmt.SetString( 1, smiubasis)
             oINsStmt.SetString( 2, smiutomake)
             oINsStmt.SetString( 3, staal)
             oINsStmt.executeUpdate()

return a error:

BASIC runtime error.
An exception occurred
Type: com.sun.star.sdbc.SQLException
Message: Incorrect syntax near ':'..

A bug or ???

Thanks for any hints

Greetz

Fernand