Help with a Lyx Problem - esint.sty not found

[Gregory Toole]

Hello Lyx Users,
My name is Greg and I am a Lyx user.  I recently installed Kubuntu v8.10
Intrepid Ibex and installed Lyx using sudo apt-get install lyx.  Lyx
installed and runs, but if I try to view my lyx work as pdf, dvi, or ps
(using the toolbar buttons), I get an error saying "LaTeX Error: File
esint.sty not found" in a popup window.  What is the problem, and what can I
do to correct this?  Thanks!
Greg