virtualbox error

[Paul Cartwright <ale@pcartwright.com>]

I'm trying to get virtualbox running on debian Lenny.
my system is a Dell desktop:
# uname -a
Linux paulandcilla 2.6.26-1-686 #1 SMP Thu Oct 9 15:18:09 UTC 2008 i686 
GNU/Linux

I have these applications installed:
ii  virtualbox-ose                                          1.6.6-dfsg-3                        
x86 virtualization solution - binaries 
ii  virtualbox-ose-modules-2.6.26-1-486                     
2.6.26+1.6.2-dfsg-4                 PC virtualization solution for Linux 
2.6.26 on x86
ii  virtualbox-ose-modules-2.6.26-1-686                     
1.6.6-dfsg-3+2.6.26-8               VirtualBox modules for Linux (kernel 
2.6.26-1-686)
ii  virtualbox-ose-modules-2.6.26-1-xen-686                 
2.6.26+1.6.2-dfsg-4                 PC virtualization solution for Linux 
2.6.26 on i686
ii  virtualbox-ose-source                                   1.6.6-dfsg-3                        
x86 virtualization solution - kernel module source

when I try to install an OS, it gets to where you start the installation and I 
get this error:
The version of the VirtualBox kernel modules and the version of VirtualBox 
application are not matching. You can correct this by either installing the 
correct virtualbox-ose-modules package (if available) through apt-get or by 
building it manually with: module-assistant auto-install virtualbox-ose.
VBox status code: -1912 (VERR_VM_DRIVER_VERSION_MISMATCH).


what do I need to install/remove to make this work??
-- 
Paul Cartwright
Registered Linux user # 367800
Registered Ubuntu User #12459