COMSOL with MATLAB crashing with trapezoidal integration

HI everyone

My LiveLink for Matlab for COMSOL 4.2a, with Matlab R2011b works fine. I have a script in Matlab that works perfectly fine in Matlab alone and Matlab with COMSOL. This script doesn't contain any COMSOL function . I'm on a Mac with OS X 10.6.8.

The problem is that when I run COMSOL with Matlab with 3.5a compatibility, Matlab crashes when executing this simple code:

X = sort(rand(1,101)*pi);
Y = sin(X);
Z = trapz(X,Y);

I need this to work first before I can run other program with COMSOL 3.5a functions. I tried repairing the LiveLink for Matlab with the 4.2a installation DVD, with no luck.

I'll greatly appreciate your help on this

Jose