I PHOTO UNABLE TO PUT ANY PIC'S ON FACEBOOK

Hello, I am unable to download any photo's from my apple mac i photo to facebook, and i mean no photo's at all grrrrr, i go into a photo on i photo press the one's i want to publish on facebook and the PUBLISH box is not HIGHLIGHTED i can change any current photo's in facebook with the ones i already have on thats fine, but come hell or high water it is not going to happen at this time, also when i go into a photo and want to use any of them as a profile pic one that has been tagged to me it tells me this 'THERE WAS A PROBLEM SAVING YOUR PROFILE PICTURE PLEASE TRY AGAIN so i am stuffed can't to anything with my photo's at the moment, any thought and experiences would really help me