Words disappear from the print out.

[deshpande.megh]

Whenever the entire page is typed on the computer each and every word typed as such is visible on desktop that is monitor. But whenever its print out is taken some middle words and lines get omitted and found disappeared from the print out. Printer is thoroughly checked but there is no problem in printer. What is this problem and how to eradicate this problem? Can anyone suggest me the answer and remedy to deal with this problem.