Xonar Essence STX - recording issues

I had been using onboard crappy audio, until I switched to a Xonar Essence STX a few weeks back. I am currently using a crappy cheap microphone which worked quite well with the onboard. Now here's the problem. There is a constant static noise when I use the mic to record anything. It was absent when I used onboard audio. So... I was wondering whether it is because the mic is too crappy for this card or is the problem with the card itself. No matter what software I use to record, it's there.

Here is a sample recording with and without mic boost (first half without and second half with mic boost): http://www.mediafire.com/?up1iav487yu6pf7

And the same recording with Ahuja AUD-98XLR mic (first half without and second half with mic boost): http://www.mediafire.com/?71ksr6xhaqm9lxa

I have been talking in the Ahuja recording, you just didn't hear it.

Now the thing is, the Ahuja, which I borrowed from a friend from their practice sessions (he formed a band last year) to see if the problem is in my mic. But to my surprise, it has VERY very low level of sound. There is no audible response even if I scream in front of it. Clapping loudly in front of the mic causes very subtle spike, which proves that the mic is indeed working with very low level of sound. But normal talking, shouting do not seem to make it respond. I made sure it is on, and my friend says the mic was in working condition.

The Ahuja comes with a 6.3mm connector, which I can connect directly to the sound card. I made sure “Front panel” is disabled in xonar control panel.

So… what’s the problem? My card? Or mic? Isn’t the Xonar designed to support a wide range of mics or just low quality ones?
If you are an owner too, do share some of your sample recordings with me so that I can compare.

Any feedback will be highly appreciated.

Thanks for reading this lengthy post. Here is the Ahuja:

Mixer or audio interface - which one would be better (as cheap as possible)?