Nios II Timer

I have the need for a 10 mS periodic timer interrupt for my system. I used the timer in the SOPC builder and selected a time base of 10 mS. To keep the size low, I opted for the simple periodic timer. After loading the new config file and writing a simple program to toggle an LED in the timer IRQ, every thing went well. I used the alarm function. My first attempt was to pass the alarm start function nticks per second so I can see the LED blink. Worked perfect! However, I tried to increase the speed, but there was no change in the IRQ frequency http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/huh.gif . No matter what I set the ntick parameter to, I always got a 1 second IRQ. Do I need to opt for the fully functional timer in the SOPC? Or is there something that I am doing wrong? Please advise...