error "No such interface supported" when openening a connection to a text file

Help !!!!!!
I'm trying to open a text file with an ADO connection.
This is the code :

Dim objConn As New ADODB.Connection

objConn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" &
strPathtoTextFile & ";" & _
"Extended Properties=""text;HDR=No;FMT=Delimited"""

strPathtoTextFile is the path where the text file is located eg d:\
in the same directory i have also a Schema.ini and look like this :
[Test.txt]
Format=FixedLength

Col1=Name Text Width 20
Col2=LastName Text Width 15

when I try to open the connection I get this error :
-2147467262 : No such interface supported

Can somebody help me ?

.