String to varchar2

hi!
i'm trying to convert a string to varchar2 in vb, i made a connection like this:

Set OraSession = CreateObject("OracleInProcServer.XOraSession")

Set OraDatabase = OraSession.DbOpenDatabase("ORANTSIN", "gerrit/jiggaman", CInt(1))

Set rst = OraDatabase.DbCreateDynaset("select * from archivesdocu2002", CInt(1))

and i'm trying to insert like this:
With rst
Addnew
fields("serie") = "test"
update
close
end with

serie is here a varchar2(4) and the result i get in the table is "??",

What must i do to get the right information in my oracle table?

--
Posted via http://dbforums.com