Problem in painting an object

hi all , i got another problem but plz now help me, all my previous problems i died to fix alone, so now my problem is that when i try to paint an object using material editor, nothing appears on the object which has been painted except the color of the texture itself, mentioning that when i paint another object with the same texture, it happens to appear on it, so what's the problem?? i think it's in the object itself but if so, how can i fix it???