I get the following error when I “initialized” the module - Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 158 bytes) in /home/site/public_html/classifieds/modules/us_zipcode/init.php on line 31

This is because php's memory size is to small to run the file. What you can do to try and fix it is open the modules/us_zipcode/init.php in a text editor and find this line:

ini_set("memory_limit", "16M");

Then change to:

ini_set("memory_limit", "32M");