Multialign error in MATLAB

I keep getting the following error:

ma = multialign(hypno,tree,'ScoringMatrix',...
              {'pam150','pam200','pam250'})
showalignment(ma)
Error using zeros
Out of memory. Type HELP MEMORY for your options.
Error in profalign>affinegap (line 585)
F =  zeros(n+1,m+1,numStates);
Error in profalign (line 363)
  [F, pointer] = affinegap(prof1,len1,prof2,len2,SM,go1,go2,ge1,ge2,wg1,wg2);
Error in multialign (line 563)
  [profs{rootInd} h1 h2] = profalign(profs{[i,rootInd]},...

I got the code from the MATLAB multialign page.