first mic please help

 yesterday i went and bought an audio-technica at2020 cardioid condenser mic to use with my sonar 8.52 producer set-up. i plugged it into the left input of my ua-25ex and switched on phantom power.
i created an audio track in sonar and selected ua-25ex left input. i can not figure out how to get sound from the mic. i armed the track, turned on input echo, twiddled all the knobs on the interface.
i can hear it faintly if i scratch the mic screen with my fingernail, and touching the mic body produces static noise. i had my mic and cable tested in the store and seemed to function.
 i can direct input my guitar into the interface without issue.
 i feel i must be stupidly missing something everybody here knows.
 please point me in the right direction.
 

thank you mike.
 the track is armed  and there is signal bouncing around at close to the bottom of the meter. if the interface has a control panel app it is news to me but i did look just now.

Hmm, I use a board that has direct monitoring so I've never used the input echo.
Maybe you do need it.

The UA does have pre-amps that should be strong enough to drive the mic so not sure whats going on here.

Mike 

thank you dave.
 i have taken all of the steps you mentioned( at least i think so ). i think the drivers are ok because the interface works fine with a guitar going into it, but this is my first attempt at mic recording. i am used to a fair ammount of messing around whenever i try to add any technology to my musical endevours, so i will not be discouraged. although you can not recall the fix in the thread you mentioned, perhaps you can remember a keyword or something to help me find it. the obvious ones i could think of all lead me back to my own thread(which has no resolve yet)!

it was the damn cable. i don`t fully understand how i can take it back to the store when i first started trouble-shooting this and have it tested out to be ok and then find out it really  the problem after all. i guess i just have to accumulate more pre-amps and cables and stuff so i can actually trouble-shoot new equipment without having to drive half an hour to a gear shop to have a cable checked.
 thanks again to all who replied and i`ve said it before- this forum rules!
now to learn to sing...

You should always have spare cables, extra guitar strings and picks (if you own guitars), extra drumsticks (if you play drums), extra batteries (if any of your gear uses them)...