Problem with changing width and height in Export JPEG with Flash/PHP example

Hi there

I was trying to change width and height of the movieclip in Export JPEG with Flash/PHP example. But problem is if i change width and height (which is originally 485 and 165) then in the new browser window i dont get any output.

I tried to search in google to solve this problem and i think the problem is with php processes memory size or php script timeout issue or so. I checked my php settings and got following information

memory_limit = 32M
max_execution_time = 30
max_input_time = 60

Is there a way to solve this problem ???

Please somebody give some suggestion/solution to solve this problem, it would be really grateful.

Thanks a lot in advance

Regards