I just thought of something... do you have a multimeter around? Test the outlet before you plug in! I'm sure online you can figure out which slot is supposed to be hot (my guess is it will be the left slot as you're looking at the outlet with the ground pin at bottom). Or, easier yet, but maybe hard to find overseas... there's a handy little outlet tester available at any hardware store (here stateside, anyway) that you plug into your outlet. It has lights that light up and tell you if everything is OK or if the polarity is reversed, ground faults, etc.
In fact, EVERY MUSICIAN should carry one of these!!!
I have a blood-curdling story to tell to prove it:
Remember when the TD-10 came out? It was the biggest, baddest unit to be had ($$$$$$!!!) and I pre-ordered one so I could get it as early as possible. It came in at the store, I got it home, and plugged it into the wall, and ran an RCA line to my home stereo as my sound source. I turned both units on, heard a nasty pop, smelled electrical smoke, and so I turned everything off. Neither my stereo receiver nor my TD-10 would work. The TD was DEAD and the stereo only worked on "Tape" input, which had previously never been used.
Since my stereo had worked for years, and the TD had NEVER worked even once, I naturally assumed it was a faulty TD-10 that had just fried my fantastic Denon amplifier. I returned it for warranty coverage, and later got a new one. Meanwhile, the Denon repair guy said it looked like my amp had been struck by lightning... the traces were VAPORIZED; the printed circuitboard was largely BLANK. Incredible damage. I started to suspect something...
Here is what had happened: some idiot had DIY'ed the electrical work in my basement before I rented it. He had done two things wrong, with disastrous results. First, he had used 3-wire outlets (grounded) with TWO-CONDUCTOR wire. They LOOKED like grounded outlets, but weren't (this is extremely dangerous!). Secondly, he had wired some of the outlets backward, so hot and common were reversed. Any AC device would work properly when plugged in, but here's the catch: in a 2-wire device (with no ground pin) the chassis ground is wired to the "common" side of the AC. Since at least one of my outlets (the one my stereo was in) was wired backward, when I plugged in the RCA cable between the 2 units, THE RCA CABLE WAS CARRYING AC!!!! As soon as I powered them on, AC was running through the AUDIO connections. No wonder the catastrophic damage ensued.
Long story moral: TEST YOUR OUTLETS, even at the gig. Power condition everything too... I use a Monster 2500. Expensive, yes... but peace of mind is worth it!