I'm not sure why you need all that Javascript to submit a form, something that your browser would do just fine on its own. But to the debugging question, if your script isn't executing the print statements, then it seems that your if condition isn't returning true. Try adding a print statement to your else clause, and see if that prints. If it does, try printing $name and $age and see if the problem is with one or both of them. Another aid would be to use Data::Dumper or one of its sisters to dump the contents of $response, and see what's really in there.

This is basic debugging. When your program doesn't give you the output you expect, have it tell you what it's doing, what parts of the program are executed, what values it has in different places. There are more sophisticated debugging tools, but I've found a lot of problems just by adding a   print 'got here'; line in different spots and reloading.