Update dBase file using ODBCconnection

[yefei]

Now I am doing in asp.net 2.0 using Visual Web Developer 2005 express
edition
I have set up a connction to a dBase IV file .dbf using ODBCconnection
but by default I can only read the data(i.e. using SELECT command)
I cannot change the structure of the .dbf file
any one can give me a sample code of doing this?
if I got errors like
ERROR [07002] [Microsoft][ODBC Microsoft Access Driver] Too few
parameters. expected 3

but the table i am updating only has two fields

need your help