upgrade error 1.4.27 > 1.5.20

[repusez]

i've not touch my coppermine gallery until one day my sys admin said that they are going to update their php from 5.2 to 5.3.
after the php upgrade that I cannot even load my coppermine gallery.

so i tried upgrade my coppermine gallery by copying all the files from the 1.5.20 directory except any
include/config.inc.php , albums and anycontent.php

after that i uncomment define('SKIP_AUTHENTICATION', true) in the update.php and proceed to run it, everything runs ok. but after that i tried to open my coppermine gallery and nothing is loaded, the page is just blank

my gallery is yihzy.com/cgal . can anyone help.

[repusez]

ok, finally i found out what's wrong,

it's the old plugins, i deleted them and the website can now partially work at least