Plotting Impulse Response in FDA Tool Error

Hello, I am having a problem plotting the impulse response in the FDAtool. When I try to plot the response of a FIR window signal, using specify order , hamming window, and normalized units, I am given the error Matrix dimensions must agree.

Any ideas what the problem might be?

Specifically I am using Lowpass response, FIR window, Specify order 22, Window Hamming, Units Normalized (0 to 1), and wc: 0.35, but I've encountered the same problem using different values for specify order and wc.

[Wayne King]

Can you say which version of MATLAB you are using and do you have the DSP System Toolbox or just signal?