Windows 7, 6gb memory, lots of disk space, Alesis QX49 keyboard, e-mu xmidi1x1 Tab input and output driver. BIAB 2014

I have a decent pc laptop, a Alesis QX49 keyboard and I cannot get any sound out of my pc when using the 'Hi-Q/SampleTank' sounds. Are these two things equivalent? Hi-Q = SampleTank? My initial problem is a very bad case of latency when I use the keyboard. I will hit a key and then I hear the sound later. Too late. I know that the keyboard is good because I have played it with absolutely no latency when using the sounds from my Alesis Quadrasynth.

I have been in the 'Midi/Audio drivers' dialog a thousand times and I can not get anything working except the GS WaveTable Synth which I am sure are not the best sounds I can get and are unusable because of the latency on the keyboard.

What am I missing? I have studied the help screens and am more confused then I was to begin with. I am thinking about forgetting the entire PC/BIAB path and getting GarageBand to use with an IPAD.

Any help would be more than a little appreciated.

Thanks very much,
Jim Lee