Line fault at the outlet -- do I need an electrician?


Yesterday, I got a Panamax, Max 1500 surge protector and line conditioner. (I got a very good deal on it, and am just trying it out.)

I plugged it into an outlet I've been using for a while and one of the red lights on the front lit up saying "line fault." (I'm not sure how this is different from a "ground fault." Maybe it's the same.) The Panamax does not do this with other outlets in the room. They seem ok.

So, I know this means that the outlet is improperly wired. My question is, might this be a simple thing to check and/or fix? Any suggestions most appreciated. It's the only outlet I can use to have my audio set up where I usually have it. Now is not an optimal time to call an electrician. If this is a big problem, I'll try out my gear somewhere else in the room, but if I can fix this without too much expertise, that would be ideal.
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Hopefully you fix the last receptacle in the circuit, otherwise you'll have to change out the rest because they'll now be reversed. 
Well, it seems you've done it. Congrats.
Oh, I misread. You just need to reverse one, then the next one in line will be fixed.
@cissado -- I would need to reverse the initial one, no? Or perhaps it's messed up all the way back at the box? I am shying away...
This first one is reversed pull it out and see if the white wire is on the bronze screw side and black wire on the silver screw side which would be wrong. If not look at the receptacle prior where it's  drawing power from for the same thing. Black to bronze, white to silver, bare wire to green screw is how they should be.