problem in executing JDBC program through form using PHP

[mamoon]

hi all,
i am facing a serious problem in running JDBC programm in Apache server environment.
Background Information-
1, OS: Enterprise Linux4 running Apache2
2. pgsql8.2
3.JDBC driver: pg74.215.jdbc3.jar
i am using jdbc client interface to pgsql database.
Although i am able to connect to database server through java progm loading JDBC driver from my console(bash). BUT i am unable to run the same java progm through a html form using php. APART from this the regular java progm (NOT jdbc) is executing through html form using "system " command in php.
i looked into Apache error_log, it looked like-

[Wed May 30 16:37:11 2007] [error] [client 127.0.0.1] File does not exist: /var/www/html/favicon.ico
 

Can anyone suggest how to fix the bug? i will be obliged .
with regard
mamoon