Well now that I have all my lights out and tested (with ren-c and grinch) it's the time for ren48lsd and the rainbows, its the first year that I use them and I can't get the ren48 working. The rainbows are ok because I tested them applying 12v to the conector and all of them where ok. The ren48 don't works, I followed the troubleshoting and I think that the problem is with comunication. I have the clock ok and the soldering seems to be ok so I think that the problem is with reciveing data. The problem can be the stop bits? With ren-c I have 1 stop bit and with my computer I cant setup 0 stop bits and in the troubleshoting guide says to setup with 0 stop bits.