I have an install problem

Hi
i try and try and try to install Gallery 2.3
all works well until i have to wait fore Install Gallery Core
it stars and wen the band reches e from module it stops
and i get this on the end of the page
Fatal error: Maximum execution time of 180 seconds exceeded in C:\xampp\htdocs\modules\core\classes\Gallery.class on line 762
i went to Gallery.class and on line 762 is this }
pls help me