resample gives dimension error

When I use the resample function, I get a dimension error. Here is the example used in the MATLAB help file, with the output: fs1 = 10; % Original sampling frequency in Hz t1 = 0:1/fs1:1; % Time vector x = t1; % Define a linear sequence y = resample(x,3,2); % Now resample it Error using +  Matrix dimensions must agree. Error in firls (line 161) b = b + (F(s+1)*(m*F(s+1)+b1)*sinc(2*k*F(s+1)) ... Error in resample (line 85) h = p*firls( L-1, [0 2*fc 2*fc 1], [1 1 0 0]).*kaiser(L,bta)' ;