Hi hildabeth:
Thank you for your post. I will do my best to assist you!
Here is a link to the HP Wireless Classic Desktop User guides, for your keyboard and mouse. Did you install batteries into both the keyboard and mouse? Did you turn the mouse on? When you connected the usb piece into the port, did the computer recognize it? Have you tried a different usb port on your computer? Have you tried different batteries in keyboard and mouse.The last thing, is to try it, on another computer. If none of the above has been able to get the keyboard and mouse recognized, you could call HP support or depending on the store return policy, you maybe able to exchange it.
Please call our technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region. http://www.hp.com/cgi-bin/hpsupport/index.pl
Sparkles1