MISSING NOTES ?

[dannymix]

When Im playing as Im recording a midi part some notes dont sound or only played shorter than played it gets worse when there is more midi tracks playing at once?
It even happends when Im playing a simple 4/4 kick this is my setup!

PII 333 192meg 6.4gig AWE64 sound card Matrox 200 graphics.
Roland JV1080 Korg X5:
Roland A880 MIDI patchpay:
The Midi lead in connected to the joystick port!
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CUBASE SETTINGS!

OPTIONS/SYNCRONIZATION/
Songstart 00:00:00:00:00
Timedisplay 00:00:00:00:00
Bardisplay 0
Locktime 3
Droptime 6
MROS/System resoloution 192
System preroll 750
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ALSO PLEASE CAN ANYONE TELL ME WHY ISNT THERE ANY COLOUR IN THE EDIT SCREEN AT THE BOTTOM TO MATCH THE VELOCITY COLOURS
THE PART WHERE YOU CAN DRAWER THE VALUE OF VELOCITY, AS IN THE MANUAL IN THE GETING STARTED BOOK P21 IT SHOWS IT IN COLOUR MATCHING THE COLOUR ON THE NOTES?