Odd stats - need help

I showing some odd stats in my analog, as compared to a simple "impression
tracker" I have scripted on a page.

Quite simply, I pull a random image from a database and display it on the
screen, then I update that database record by adding 1 to the impression
count.  Very simple.

1. get random image from database
2. display image
3. update database impression count (+1)

But I get very skewed results, here are my impression counts for one
particular banner through my simple script:
Impressions: 100121

Yet Analog shows this:
4297  0.16%  19/Mar/08 15:50  /banners/468x60.jpg

So I've recorded over 100,000 impressions, but analog only recorded 4297
requests.

Anyone have an explanation or general direction I can look to sort this out?



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