Can't locate DBD/Sybase.pm in @INC

I'd start with investigating why Sybase.pm isn't found... (put differently - as this .pm file would pull in the associated .dll - you haven't even gotten as far that any missing .lib files could matter).  Check where the installation procedure has put Sybase.pm and/or why this path isn't included in @INC.  In case you did install the module, that is.   (Do you maybe have several installations of Perl on the same machine?)