error installing DB2 Express-C 9.1 on Centos-5.1

I was getting this error while executing the ./db2_install program.

The following library files could not be loaded by db2langdir in
/home/Owner/Desktop/exp/disk1/db2/Linux/install/.. /bin
--> libstdc++.so.5
--> libstdc++.so.5

This fixed it:

yum -y install compat-libstdc++-33