sorry for the late response...
Which APEX Listener version do you use?
Please note that RESTful services in APEX 4.2 only work with APEX Listener 2, no earlier release and no other web server for APEX (i.e, not with OHS or EPG).
I have already installed Apex listener 2 on Weblogic server but it gives 404 page not found error. then I tried to install in standalone mode, but it gives page not found. So now what should i do ?, I google but no post on how to reinstall apex listener or how to remove apex listener, so that i can reinstall listener.. plese help me.
Removing would be just undeploying. But I don't think this will really help you.
If you don't see these buttons, probably either something with your browser or with your static contents ("images") is wrong.
I have already installed Apex listener 2 on Weblogic server but it gives 404 page not found error.
If the test and bind variables buttons are hidden, it is because APEX has RESTful Services disabled. Please double check you have followed all steps in the APEX 4.2.1 install guide including the additional steps requried to enable RESTful Services. If you continue to have problems it would be worth posting the issue in the APEX forum.
I have check and followed all the steps to enable the restful services. still while checking listener it shows 404 page not found. and also i am unable to see Oracle XE home page. it gives data not found.
Parekh, please make sure you have reviewed the Listener install guide and release notes, there is no /apex/listenerConfigure URL in 2.0.0 as the web based UI has been superceded by a SQL Developer based UI.