I have been using Zen cart for a while now, and up till now have had no major problems, but for some reason, just over the last couple of days, when I enter a product, I put in Taxable goods and if I enter something in Net it doesnt calculate in gross, or if I enter something in gross it doesnt enter something in Net. Also I used to be able to click on a product name to edit, but it seems to have disabled that too. HELP!!