Dileep,
It seems to me some problem with Perl module that properly not installed or might be the lib path (xxxx.so) files in different location.

So why I asked for
#echo $ORACLE_HOME/lib >> /etc/ld.so.conf

Here it will put all the .so files with in /etc/ld.so.conf files.

# ldconfig

After executing the above command it will get affect mean to say it will read all these .so files location.

One suggestion you can verify whether that files (.pm) is existing or not
"/usr/lib/perl5/5.8.0/i586-linux-thread-multi/DynaLoader.pm "

## find / -name DynaLoader.pm

Then compare the location .. If it is not there that mean Your driver DBD perl module didn't compile properly.

~~~Sanjay~~~