I setup my Foobar to use custom buttons, however upon restart, I recieve the following error:

ERROR (foo_ui_columns) : Failed to load libpng. Ensure you have libpng and zlib present in an appropriate location.
INFO (CORE) : startup time: 1500 ms

So I went and searched around for "libpng" and "zlib". I found an install for libpng and it installed to C:\Program Files\GnuWin32 and then I found "zlib" and I put the files in the proper places within GnuWin32. Did I do somthing wrong? Why am I still getting this error message???