Betty,

Sorry it looks like I can't really help you on this forum. I would try a google search of "Call to a member function on a non-object in site:zen-cart.com" to see some of the other threads involving this problem. I know that 1.3.8 was optimized for php 5.2. I don't know if your problems could be stemming from this. Overall though I haven't seen this happen before. I'm running this mod with most all of the packages you listed with no complications. So I'm guessing the problem lies elsewhere. Again sorry. Further more judging by the line that is giving the error it looks like easy populate is trying to tell you that your temp directory is missing...