vbox guest installing problem

pc: compaq presario C500
problem using: virtual box
host: Vista
guest: Ubuntu 8.04
problem: can install VBox guest addition

haai

i have a problem with the install of virtual box guest additions. at first i installed the guest addition from the iso image in ubuntu. that does not work so i have searched for this problem on the net and i found a way to install it with the terminal so i filled in this code:

sudo sh ./VBoxLinuxGuestAdditions.run

when i did this the following message told me that the guest additions is not installed. please help me.

VirtualBox 1.6.0 Guest Additions installation
Please install the build and header files for your current Linux kernel.
The current kernel version is 2.6.24-16-386
Problems were found which would prevent the Guest Additions from installing.
Please correct these problems and try again.

sorry for my bad english please edit my bad english in good english Xd