How to read a local file from Forms10g using PJC/Bean

I'm trying to read a file on the client machine using a Bean.
The code in the Bean is:
File fp = new File(mFileName);
printToConsole( "AFTER creating a File object " );
if (fp.exists())
I get the message after creating File object. But at the next statement - fp.exists() - the Forms session terminates giving a FRM-92100 - Your connection to the server was interrupted.
Any ideas?
Thanks in advance for your help.
Amit

Frank, Thank you for your response on signing the jar. That was exactly what I was missing. After signing the jar, I am able to do client level operations.
Grant, Thank you for asking about WebUtil. To give you a background as to what we are trying to do - to integrate our Forms 10g application with another software - in this case a client-server app. We want to send a message from this app. to our Forms10g app.(a pre-defined Form in the app.) which would initiate certain Forms navigation based on the message. In essence, Forms needs to be "listening" to this app. (in a non-blocking mode, the Forms app. should not be "locked-out" while listening for a message)
The only way I could think of was to write a Bean (modified version of Frank's Dispatch Event sample on his blog) which would spawn a thread and listen for a message from the other app. For our prototype, I started off with watching for a file on the client machine. The final goal is to listen for a message on MQ. This will facilitate us to integrate our Forms10g app. with any other app.
Regarding WebUtil, I did not find a way to do the listening/polling in a non-blocking way. Maybe I must have missed the obvious - Frank can very well attest to that.
Any feedback is most welcome.
Thanks.
Amit

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