Go to checkout button leads to blank page

[dbltoe]

I think we'll just have to step up the update rather than go through those steps. Hopefully that will fix the problem.

You will need to either run through the steps OR make absolutely sure that every file you bring over from the old site is checked against an original.
Many "continuing problems" have been the result of an upgrade without checking what is being brought out of the old site.

Might be best to just load 1.5.1, create a new template, and update the database. Kind of a "Start Over." See http://www.zen-cart.com/entry.php?3-...d-of-upgrading