Maybe the ice maker is turned off. Look for the thin, coat-hanger-like metal bar on the right side of your ice maker. When this bar is up, the ice maker is off. When the bar is down, the ice maker is on.
During normal ice maker operation, the bar is up (the ice maker turns off) while the unit drops ice into the holding bin. The bar comes down (the ice maker turns on) when all the ice has been dropped. See our Ice Machine Troubleshooting area for more help.
If the bar is up, gently lower it to begin making more ice.