lime wire is blocked

dont even know if i can describe my problem since this is my first computer one month old, iMac Intel, mac OSX, just got ADSL internet connect a couple of weeks ago. my son helped me set up lime wire, last nite, giving me instructions over the fone. we tried a few audios and they were downloaded successfully. we tried 3 movies, which were down loading slowly but surely, then this morning when i checked to see how the movies were going the lime wire screen was blocked, to make things worse, the electrician came today and had to turn off main power switch and i shut down comupter, when i when back to check lime wire, it is still blocked and there are three little windows, identical that say shutting down limewire, with blue and white diagonal stripes moving along a horizonal bar. bear with me cuz i am not computer literate. can anyone help me unlock the lime wire enabling open information sharing page. thanks