How to open a ".mlib" files with Stata?

Dear all,
I installed an online Stata code (mergersim) in Stata 11.
The program consists several files which were installed in C:\ado\plus\m and C:\ado\plus\l.
One of the files is a ".mlib" file. I'm trying to open it with Stata without success.
I got the following error:
file C:\ado\plus\l\lmergersim.mlib not Stata format
r(610);
Is there a way to open a ".mlib" files with Stata?
Thank you for your time,
Anat