PROBLEM SOLVED.I was ready to throw everything out of the window,when i managed to make midi work smoothly with SFP synths and Cubase Sx 3
SETTINGS FOR USING SCOPE SYNTHS TRIGGERED BOTH FROM CUBASE AND EXTERNAL KEYBOARD
SFP : as the 4.5 manual says : Luna midi source ->Seq midi dest
Seq midi source -> Synth->Mixer->output
Cubase sx 3
1.Put back midi port filter file in his folder (= no use of emulated port)
2.The timestamp,i didn't noticed there were TWO of them in the menu,one in Windows Midi,one in DirectMusic . ACTIVATED BOTH
3.Cubase preferences / Midi / Midi filter = all boxes unchecked
4.MIDI THRU ACTIVATED ! (to make cubase"echo" the input coming from the midi keyboard
Thx Valis for your help,much appreciated !