Oracle Forms Runtime error When I am running a form in Forms 11g

http://rahulsingh-pc:8888/forms/frmservlet


I'm getting an error:

Failure of server APACHE bridge:
No backend server available for connection: timed out after 10 seconds or idempotent set to OFF. 


Products installed:


Web Logic 10.3.5
forms&amp;reports&amp;portals 11.1.2.0


Can anybody help me fix this problem?
This is Weblogic. The FORMS services are actually answered by a Weblogic Java Server. It is named WLS_FORMS and you can start it via the web logic management console (available by default as http://localhost:7001/console).

Click on the servers link on the left, then on the main pane, select "Control" tab. Select the checkbox next to WLS_FORMS and select "Start listening".