Problem at finding sybase open client library when installing DBD::Sybase

[email protected] (lippel anna)
Newsgroups perl.dbi.users
Message-ID <[email protected]>
Hello guys, I am supposed to have the Sybase Open Client library installed in my pc under the folder "OCS-12_0". I started the installation of DBD::Sybase with the download provided on CPAN and when I run perl Makefile.PL it tells me "Unknown Client Library version - assuming FreeTDS." so basically he's not finding the open client library. On his README Michael Peppler tells before starting to install: 
"Make sure that the SYBASE environment variable points to the Sybase
installation that you want to use for this build. The easiest way
to do this is to source the SYBASE.sh/SYBASE.csh or SYBASE.bat file
in the root directory of the Sybase installation you want to use."

May be that's about my problem but I don't understand how to do this. I am totally new to this and perl as well could someone please help me?
Thanks
Anna Lippel
 		 	   		  
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