need help with Prusa i3

i have Prusa i3 and every time i print this happen (see pictures in attachment)
empty spaces keep happening even if i make it 100% solid and 100% fill density, i tried lot of shapes and sizes same problem
this is the options i use to print:
Layer height = 0.1 mm (and i tried 0.06)
Shell thickness = 1.2 mm
Bottom/Top thickness = 0.6 mm
Print speed = 50% (tried 25% - 40% and 100%)
Bed temperature = 50-60 for PLA / 60-70 for ABS
Nozzle temperature = 220-230 for PLA / 250-260 for ABS

filament size = 1.75
Nozzle size = 0.4 mm

What kind of material/filament are you printing with -- ABS or PLA? And what was that supposed to look like originally?

Could this issue be due to a lot of moisture in the filament, I wonder?

Edited 2 time(s). Last edit at 03/22/2015 10:11AM by 55rebel.

i tried both ABS and PLA
i was trying to make cylinder but i stopped the print because the sides are not solid
i don't think its the moisture because i tried with three different filament two PLA (one Green and one black) and one ABS.
maybe the printing options is wrong??

Edited 2 time(s). Last edit at 03/22/2015 10:59AM by Blinder25.

Have you verified that the filament is not slipping?

it was slipping a little
thank you so much it work great even on 100% speed

Glad you found the problem. Happy printing

On what did the filament slip?