Yikes with 40 mods.... Sorry....
Christina, as a rule of thumb I always create a test site, and load a module first to check it functionability, then if ok, off to installling it on my main site...

Did you look at the VAT thread to see if similar problems..

This is where you will find commercial help:
https://www.odesk.com/contractors/sk...qs=zencart,&c1