Turned album art off, turned back on, and art disappeared

[insanemonkey441]

I have all of my music (7500) songs, with album art. When i got my ipod, i loaded all of the music on to it. 3 days later i turned off album art on the ipod.
Now i turned the album art back on, and it has all disappeared!
Only about 3 albums still have the album art. Is there any way i can recover the missing art, without having to reload all of the music back on? (i have erased some of the music from the computer)

another thing: when the iPod is connected to the computer, I can see the all of the album art in itunes.

Last question: Does showing the album art decrease the battery life?

Edit: I have tried searching the subject, but have found nothing much that helped.


Thanks in advance,
insanemonkey

[insanemonkey441]

Problem fixed, I tried again to turn off album art, and then turn it on,
then it suddenly worked