You need to select what it is that is being used to delimit the fields. It's usually a comma ("COMMA Seperated Values") but it can also be a tab, pipe ( | ) semicolon etc
the data preview box below the selection options will give you a preview of what the data contained in the file will look like with that delimiter selected.
Dude -- you're making me think very hard very late at night Hope I make sense.
If it's nothing confidential (and you can trust me to delete it straight afterwards, anyway) feel free to email it to steve @ texo.co.za and I'll quickly save it for you as a xls file.