It sounds like the coordinates in coords.txt in your map are screwed up...
Basically, that file contains the google sequence numbers for the top left tile at the most detailed zoom that you selected... (x, y & zoom)
You should be able to put those numbersfrom your file in to the url below and see the top left tile in your map...
For example, if you have:
19280 24656 1
then your top left tile (1x/000/1x000000.jpg should look like this:
http://mt1.google.com/mt?v=w2.21&x=19280&y=24656&zoom=1
If this is not the case, then something got screwed up during map generation... did you use in7ane's tool?