cursor movement

Hello friends, I am new to excel. I've prepared an excel sheet from the code given by MUDRAKER in a 2007 post. this VBA code helps me cycle through the unlocked cells. My problem is that my cursor jumps from H4 to L4 instead of going to H5 after protecting the sheet. However, if i remove protection everything runs fine. I think there is some problem with my sheet. I am attaching the excel file.Please help.