I think the
1. Class.forName("com.cloudscape.core.JDBCDriver");(not COM) (may be it is incorrect driver class  path or it is not added to your application server class path)

is incorrect.

I suggest you that use the connection  DataSource provided by most application Servers including WebLogic.It supporst ConnectionPooling and using connections by means of JNDI.It gives you beter performance!