Ensure that you have JDBC metadata support installed on the database server. This is usually an issue only for versions earlier than 12.5.
The directory context for Sybase* SQL scripts is install-dir\DirXMLUtilities\jdbc\sql\sybase_ase\install.
From a Sybase client, such as isql, log in as the sa user and execute the 1_install.sql installation script.
For example, from the command line, execute:
isql -U sa -P -i 1_install.sql
By default, the sa account has no password.