There were a lot of discussions on this matter here. So you could use search to find the answer. In short, you need to format date cells in Excel manually or using automation, or you should convert xls file to csv and then append from csv file.

>hello i have a field, i.e. 05-Aug-02 10:17:17 in Excel but everytime i use the tool wizard to import it the field in my table are empty, i have played, changing the format of the cell, but it keeps the same thing.
>
>How can i do this, exist some utility?
>Thanks