You have set, through the connection properties, HDR=Yes, which to excel means that the first row is an header that contains column names. Since you have no header columns, you should set HDR=No instead.
oConn.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=" & strFilePath & ";" & _
"Extended Properties=""text;HDR=No;FMT=Delimited"""