Importing new tracks to mediabase

Here's what i did:
-import new tracks to my hard disc
-Scan my disc with mixvibes for new entries an d ok i found them
-select all and save madiabase
-restart mixvibes and load my mediabase again
-analysing new tracks Gain/Bpm/Duration
-Select all and save mediabase
-Restart mivibes and load again mediabase
-Testing tracks Bpm and writing comments and genres
-All ok, select all and save mediabase
-Restart mixbibes and load mediabase
-Select the new tracks and write tags and restart mixvibes
-Now loading new tracks, the 90% of them, does not shows the waveform and i have to load them again one by one to create it again.
-Saving and restarting mixvibe's mediabase seems that everything works ok.
Sorry for being very detailed but i wanted to show you excactly what i did and someone maybe help me.
Thanks a lot
Stelios, Greece!!!
-import new tracks to my hard disc
-Scan my disc with mixvibes for new entries an d ok i found them
-select all and save madiabase
-restart mixvibes and load my mediabase again
-analysing new tracks Gain/Bpm/Duration
-Select all and save mediabase
-Restart mivibes and load again mediabase
-Testing tracks Bpm and writing comments and genres
-All ok, select all and save mediabase
-Restart mixbibes and load mediabase
-Select the new tracks and write tags and restart mixvibes
-Now loading new tracks, the 90% of them, does not shows the waveform and i have to load them again one by one to create it again.
-Saving and restarting mixvibe's mediabase seems that everything works ok.
Sorry for being very detailed but i wanted to show you excactly what i did and someone maybe help me.
Thanks a lot
Stelios, Greece!!!