Performance issue of Forms & Report running in Web environment

Hi,
We have been using Oracle web forms and reports but experience slow and unstable of application when run in web as java applet.
Besides, after using quite intensively during the day or idle for some time in the day, forms is very likely to go halt, which is the biggest problem when we need to serve a lot of customers in queue. When this thing happens, the entire browser needs to be restarted. We can't afford to always do that.
Is anybody out there face the same problem with Oracle Web Forms or not? If yes, can someone provide some guidance and advice on this.
Really appreciate your help in advance.
Please advise.
Thanks.

In the server registry entry or env variable
FORMS60_TIMEOUT
-- Length of time (in minutes) after which the server process shuts
down if there is no communication with the Java Client
(check out the online help of forms builder).
there are some notes about this parameter on http://metalink.oracle.com

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