Source in the PHP.ini the line Resource Limits and change memory limit to 10M
;;;;;;;;;;;;;;;;;;;
; Resource Limits ;
;;;;;;;;;;;;;;;;;;;
max_execution_time = 30 ; Maximum execution time of each script, in seconds
max_input_time = 60 ; Maximum amount of time each script may spend parsing request data
memory_limit = 10M ; Maximum amount of memory a script may consume (8MB)
