hello guys

i try to update kernal to linux-image-2.6.30.7

but i get error every time

i use apt-get -f install the same error

and apt-get autoclean


the command i use
Code:
 dpkg -i --force all linux-image-2.6.30.7_2.6.30.7-10.00.Custom_i386.deb
and the error
Code:
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/dkms
run-parts: executing /etc/kernel/postinst.d/nvidia-common
run-parts: /etc/kernel/postinst.d/nvidia-common exited with return code 20
Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-2.6.30.7.postinst line 1181.
dpkg: error processing linux-image-2.6.30.7 (--install):
 subprocess post-installation script returned error exit status 2
Errors were encountered while processing:
 linux-image-2.6.30.7
if someone can help me please