Guys, thank you all for the help. I've read every answare and toke something of almost every one.
Wawa, larryd and JohnRob
From now on i'am going to use relays as collector loads so i can have the expected voltage on its coils.
MarkT
Thank you for the info about lamps.
JohnRob
I think the first relay i burned because i gave two commands to the module at basicly the same time: turn on and turn off the relay, wich made it got stuck on the normally open position.
TomGeorge
Thank you for the help with the pics.
Grumpy_Mike
I don't think i got what u meant.
That's the following:
I put my board on the table to analyse and put into the microcontroler a code to just blink the relays, one at a time, with one second between turns on and off. And when i plugged on it just started a noise like if the relay was comutating like thousand times per second, a loud noise, both of them. like if it was about to burn. Then i pugged off and start looking for some problem on the board. And i found. The ground was not getting to the relays. like if the voltage was fluctuating on the coils. I belive the trail wich connected the relays to the ground was too thin and din't endured the current. I made the connection again and both relays was blinking just as expected. I installed the module back on the wall and for my surprise the relay wich was stucked on the normally open position just did the same again, after two tests. It was holding the lamp on even with the board turned off. When i gave the command to turn on this relay it was almost hard to listen to the noise, and when i commanded to turn off it was not making noise at all. Then i connected the lamp wires to the another relay and it worked normal but after some comutations it also got stuck. I am gonna put relay coil as collector coil to see if low voltage is the problem....
Thank you all for the attention and again, sorry about my grammar.