MODCHIP WILL NOT WORK HELP

I HAVE INSTALLED A MODCHIP IN MY PSX WHEN I LOAD GAMES IF NOT BACKUP COPYS LAY LOAD OK BUT IF THAY ARE BACKUPS THE GAMES FREEZ AND PLAY AND FREEZ AND SO ON PLEASE HELP IS MY LAZER NO GOOD IT MAKE FUNNY NOISE WHEN BACKUP GAMES LOAD.THANKS