Answer for Question 1:
How are you checking the output audio? If you bring the resulting render into Premiere or After Effects, do they see there being any audio or waveforms?
Answer for Question 2:
Screenshots of your composition settings, render settings, and output settings will help us figure this out.
First of all, I notice that your output module is set to render at 29.97 frames per second, but your composition is only set to 25 frames per second. This is not good and will possibly cause other issues.
Secondly, your pixel aspect ratio in the output module is weird. It should be square pixels like your composition settings.
Alright, now that that's out of the way...
After Effects version 9 (CS4) and earlier did a pretty poor job of dealing with any sort of long GOP compression schemes in video. H.264 is a prime example of a codec that old versions of AE just didn't deal with well. Even more modern versions of AE didn't do a particularly good job of encoding h.264 even though they import it pretty flawlessly. But, even more damning, the AE team actually removed the ability to render into H.264 from AE's render queue. (This is causing a bit of a stink for some folks.)
I would suggest rendering (at the correct frame rate and pixel aspect ratio) into something like QuickTime with the Photo-JPEG codec or another proper production codec and then use the Adobe Media Encoder to make your final deliverable. Once that is successful, you should be able to render with similar settings at full resolution.
Thanks for the info shared and for solution. Now i'm able to render full resolution according setting which you provided... but the audio is not yet solved.. im unable to hear the audio still... please suggest me something.
Thanks in advance and sorry for late reply...
Let's see screenshots of your new, working render settings.
i tried with 48 KHz and 41 Khz audio.. but still no audio...
Have I asked you yet what exact version number of AE CS4 you're using? (It should be 9.0.3. If it's not, consider updating: updates for Adobe Media Encoder, Premiere Pro, After Effects, Prelude, Audition, and SpeedGrade)
If that's not it, try creating a brand new project, importing a different WAV file. Render out as QuickTime with the Photo-JPEG codec. Now, import that rendered file and check if it has audio. (Press LL to reveal the waveform in the timeline.)
If that works, something in your existing project is askew. We can try some things to salvage it. If it doesn't work, we'll need to troubleshoot more.
It is Adobe CS4 126.96.36.1996.. imported different wav file and check but still no use...
As per your suggestion imported rendered out as quicktime with brand new wav file with Photo-Jpeg codec and imported the rendered file there is no audio found in it its blank....
is AECS4 is defected software is it?...
any other suggestions please...
i have vista home premium.. where in i can't upgrade to cs5/5.5 version of AE...
Again i have updated 9.0.3... but still same.... any help pls...
There is either something going on that I can't figure out from what you've told us, or something is weird with your installation of After Effects.
Wait, have you ever installed any codec packs? (K-Lite or similar?) If you have installed them, I know what the problem is.
If you have not, have you tried uninstalling, running the Adobe Cleaner tool, and reinstalling?