ADO operations

Hi,
I'm using psqlodbc-08_01_0200. I created a database with UTF-8 encoding. While inserting,updating or deleting a record, PostgreSQL Unicode Driver
returns an error : "Insufficient base table information for updating or refreshing". Before creating the database with UTF-8 encoding, i was using a database with ANSI encoding and driver as PostgreSQL ANSI. There is nothing wrong with ANSI side. DNSless connection string is the following:

"Driver={PostgreSQL Unicode};SERVER=localhost;PORT=5432;DATABASE=ncpgdb;UID=postgres;PWD=*******;
BI=4;BoolsAsChar=1;ByteaAsLongVarBinary=1;CancelAsFreeStmt=0;CommLog=0;Debug=0;
DisallowPremature=0;ExtraSysTablePrefixes=dd_;FakeOidIndex=0;
Fetch=100;Ksqo=1;LFConversion=1;LowerCaseIdentifier=0;MaxLongVarcharSize=8190;MaxVarcharSize=254;
protocol=6.4;ReadOnly=0;RowVersioning=0;ShowOidColumn=0;ShowSystemTables=0;SSLmode=prefer;
Optimizer=1;Parse=0;protocol=6.4;ReadOnly=0;RowVersioning=0;ShowOidColumn=0;ShowSystemTables=0;SSLmode=prefer;
TextAsLongVarchar=1;TrueIsMinus1=0;UniqueIndex=1;UnknownsAsLongVarchar=0;UnknownSizes=0;
UpdatableCursors=0;UseDeclareFetch=1;UseServerSidePrepare=0"

Should i change connection string parameters in order not to get the error("Insufficient base...")?