Charlene
I'm glad you enjoyed, the playing around on picnik, I find it great fun too, especially the 'neon' setting in the create section.
As for the problem of the line through the photo, unfortunately, I am not that 'printer savy'. However do you have a friend, with computer/printer set up that you could try out a copy of your photo memory file on? or failing that, bearing in mind I have no idea of what type of camera/ memory system you have, could you go and get a print done at a photo shop near you? this would hopefully eliminate the possibility of whether it is your printer or the photo memory file that has the problems.
Rosemary