Cannot connect using JDBC

I am not a DBA expert. But I was wondering if some body could help me with my problem. I cannot connect to the informix server using JDBC driver. I am running Apache in a Digital Unix v. 4.0D and I want connect to the server from a PC using Netscape 4.5 I am using the applet demo9.class that comes like example with driver jdbc v.2.00 of Informix. I have copied the files class, the file demo9.html and the file ifxjdbc.jar in the Unix. When I execute it from my PC using the Netscape gives the following error: "security.checkpropsaccess.key" The database URL that use is as it follows: "jdbc:informix-sqli://MyHost:1530/MyDBase:INFORMIXSERVER=MyServer;user=edu;p assword=MyPass;" What am I doing wrong?