Unable to make any form of incremental load work

[#1]

I've read a dozen different posts in this forum linking to .ppt and .pdf file and a blog (http://qlikviewnotes.blogspot.nl/2012/01/incremental-load-using-qlikview.html) but none of these work. 

Every time I load the data it wipes out the existing data no matter what.

I'm stumped.

How difficult does this have to be?  Look at the data in the file, find the max date, then query for new records and APPEND THE DATA.

Obviously I'm frustrated and at my wits end, can anyone offer me any pointers?

[rwunderlich]

Can you post the script you are using?

-Rob