NT3 or NT1A?

This is a curious problem. Assuming the microphone is the cause, the only solution is to have it repaired.

The other possible cause is the preamp, which would likewise require repair.

are you using an interface?
Your level will be always be lower if you are going straight in.
Your interface and mixer will help you get the correct level in to your system before recording and also shaping the sound after the recording.You just need to get more gain up in there

The reason it is not being picked up by your PC is because the NT1A is a condenser microphone and it requires an audio interface that can supply phantom power (48V) to get it powered up. Without phantom power, the NT1A won't work. You many need to buy an external audio interface that provides phantom power to use the mic. Hope that helps.

Assuming your preamp, cables, or room, aren't at fault, then your NT1-A is suffering from typical component failure and will need service. Even new mics of this type can be at the end of their useful lives, due to the cheap components used.

Hello
microphones broadly fall into 2 distinct types

1. Condenser - requires a power source either a battery inside the microphone itself or remote 'phantom power' usually provided from a p.a. mixer.
2. Dynamic - do not require a power source. Most famous of all is the Shure SM57 (instrument / vocals) and SM58 (lead vocals) used by many musicians and singers around the world.

Condenser microphones are used extensively in recording studios because they are very sensitive and have a better range than dynamic mics. However they are a bit fragile and good ones are expensive. There are plenty of cheap condenser microphones about but they give a rather tinny sound.
If you want the microphones for general band work, especially gigging you will get better value for money with dynamic microphones. These are much less sensitive that condenser mics and are intended for close up work - no more than a few inches from the mouth of the singer (use a pop shield to prevent unwanted noises) or hung close in to an instrument.
There are also 3 different pick-up patterns for microphones. Which ones you go for will depend on the use for which they are intended.

1. Cardoid - cone shaped directional pick up pattern. These will only pick up sound from in front of the microphone in a cone shape of about 60 degrees. Suitable for general vocals and instruments. Good resistance to feedback. To effectively mic-up a big instrument like a piano you may need to use more than one mic.
2. Hyper Cardoid - as above but with a much narrower pic-up sone - a cone of about 30 degrees. These are very good for lead vocals as you can drive them a bit harder without risk of feedback or picking up other instrument sounds on the stage (particularly useful if you have a singer who plays an a loud acoustic instrument or a keyboard with built in speakers). THese are okay for using to mike-up an instrument where the sound comes from a small fixed point (saxophone, violin, trumpet, acoustic guitar - provided that the musician stands still) but not much good for larger instruments like pianos or harps. They are also good for mike-ing guitar amps, but only if they don't have a separate tweeter.
3. Omni-Directional . These will pick up sound from all around. Whilst they can be good for picking up large acoustic instruments or choirs they are very prone to feedback and are not really suitable for public address purposes.

Don't be tempted to buy cheap microphones with permanently fitted cables, especially ones with a standard 6mm jack-plug. Always go for mikes with a balanced (3 pin xlr) cable as they do not pick up as much radio interference on the cable (but only provided your mixer/amp also has balanced inputs too).
Although many professionals swear by the Shure SM57 and SM58 mics mentioned above I personally prefer the AKG D55 a hyper-cardoid which has a longer pick-up range and higher output than the Shures (useful if musicians or singers hang back a bit from the mic) and usually slightly cheaper too. It is really good for lead vocals but makes a good instrument mic too with a nice crisp but warm sound across the frequency range.
For larger instruments, or two backing singers sharing a mike, I use the standard cardoid version of the same AKG (but I'm afraid I can't remember the model number now).
If you want to mike up drums that is another subject all together.

Your Rode NT1-A mic is a very good microphone, specially for vocal recordings, but as most of the proffesional microphones needs a power supply. To be more spesific when you use your NT1-A with an audio console or a mixer, the microphone preamplifier provide at the mocrophone 48Volts for it to work. In order to use NT1-A with the computer you can:

1. either you have to connect the mic with a mixer or a console and the audio output (line out) from the console to your computer's line in.
2. or you have to buy a "phantom power supply for microphones" in order to use this one between your pc and the NT1-A. In that case you will connect at the mic in of the computer.

Personally I suggest the first solution since the pc's mic pre-amplifier in not as good as a deticated mic preamplifier from a mixer or a console. I have to notice that if your 're about to buy a mixer for that use remember to ask for one with phantom power supply for the mic (or mics).
In case of a clarificationdon't hesitate to post.

Make sure your recording onto a Mono track in your software, don't choose stereo when creating the track.

what u need is agood quality microphone buy ahuja microphone then do the recording of the vocal for studio quality

Disagree with previous post. The GTrack is designed to record vocals and a mono insrtument at the same time. That's its main selling point. It should also allow monitoring of both the vocals and guitar alongside the playback from the computer. In your computer's Control Panel, go to sound preferences, select the usb microphone and click on advanced tab. It is likely yours is set up to record 1 channel at CD quality - this is how many ship for some reason. Set it to 2 Channels CD quality.
In Sonar, set your track input as USB Left for the vocals, and USB Right for your guitar.

try cleaning your plugs before inserting them into the machine. a dry clothe will do nicely. polishing the plug heads in a twisting motion.