don't execute php programm

DEAR Sir,
i have installed wamp server on my system. but i am can't execute php program.
please help me how to execute PHP program.

what error are you getting..are you placing your php files within www folder or outside it..
also what is your wamp server color.orange or green.
if it is orange check whether you have installed skype or some web accelerator..uninstall it and search for its content in Document and Settings folder in C:..