Weird Theme Issue

[ekremmert]

Hello people im new to crackberry, i have a curve 8520 and all of the themes i download (from appworld or other sources) (i am sure i downloaded a theme which is supposed to work for my phone) did not work properly. when i activate a downloaded theme it says theme could not be loaded properly, something may not function (something like that, not exact because i use the phone in my native language =) ) and i have errors like java bla bla classCastException in error log (alt + LGLG ) and i either see theme looking like Zen , or like I am always in menu (all icons are on screen). I even updated my OS to version 5.0.0.1067 which is latest, I think. Any help would be appreciated.