MIDI Keyboard note delay problem, not latency problem PLEASE HELP

Hi I have a Casio CTK-491 keyboard that I purchased mainly for its functions as a MIDI keyboard. I have it connected with a generic brand midi in/out to USB cable and connected to my PC. The problem is this: MIDI signals are transmitted flawlessly with almost no delay, but regardless of how fast or slow i play the notes they always play three notes behind. For example, let's say I hit the C note three times, then i hit the E note three times. The first two times I hit the C note nothing plays, but by the time I hit it the third time it plays normally, and then once I have switched to the E note the first two times I press it a C note plays then the third time I finally hear the E note. I've played it as fast as 150 bpm and as slow as 10 bpm and the same thing happens every time. I use fruity loops and ableton live interchangeably and the problem happens on both softwares, so I'm wondering if it is a hardware problem with either the keyboard or the computer. Any help would be MUCH appreciated.