SQL Everywhere, Ntext && ADO Classic

Hello!

I'm trying to move from MSDE to SQL Everywhere in my project, which requires using of ADO classic and i have some problems storing ntext data in SQLEv database using parametrized command.

Could it be that the problem is because of ADO classic? Is it ok to use old ADO with SQLEv OLEDB provider and will compatibility with old ADO be maintained in SQLEv?

Below is JScript code illustrating the situation:
-------------------------------
var oConn = new ActiveXObject("ADODB.Connection");
oConn.Open(sConnStr);
var oCmd = new ActiveXObject("ADODB.Command");
oCmd.ActiveConnection = oConn;
var sText = "test text";
oConn.Execute("create table tblTest(sText ntext)");
oCmd.CommandText = "insert into tblTest(sText) values(?)";
oCmd.Parameters(0).Value = sText;
oCmd.Parameters(0).Size = sText.length;
oCmd.Execute();
-------------------------------
It gives me 'Microsoft SQL Server 2005 Everywhere Edition OLE DB Provider: The given type name was unrecognized. [,,,,,]'.

If i remove 'oCmd.Parameters(0).Size = sText.length;' error changes to 'Insufficient memory to complete the operation.'

The same code works ok for MSDE and SQLExpress.

OS:Windowx XP SP2
MDAC version: 2.8

Many thanks!