I have 256 ram and i recently brought 1gb which should work with my computer. (i hope) When i have both the 256 and the 1gb of ram in the computer at the same time it doesnt start up. There is no beeps, the monitor light flashes but thats it. When i take the 256 out and put the gb in by itself the computer beeps 4 times (i have phoenix bios) and doesnt start up. Any ideas?