I am using a P2 with power injection. The first 75 RGB lights work OK but from where the power injection is, no more strips/pixels will light up. Could something be wrong with the T-Pieces I am using? I have 1 x 350W 12V power supplying the P2 and the first two strings, then a second power supply injecting after 75 RGB strips/pixels. Using T-Piece between the strings and to the power supply. Any suggestions on what could be happening?