Guest Addition Not Running At Startup

[yunring]

I am running Ubuntu 10 latest with VirtualBox latest. Installation went fine. When I try creating a shared folder, I find I had to install guest addon on every bootup for the mounting to work.

for example, if i type:
ting@Ubuntu:~$ sudo mount -t vboxsf ubuntu /home/ting/ubuntu

it would say:
.../mount.vboxsf: mounting failed with the error: Invalid argument
Now if I run the autorun.sh (from GUI and type in password), then it would run successfully and the mounting would work.
I tried reinstalling Guest Addon by running the autorun.sh script and everytime it would say removing old one and installed new one successfully.
any ideas would be appriciated.

[Sasquatch]

You followed my two guides for installation of the GA and mounting of the SF? If you did, then nothing should prevent you to mount the SF after a reboot.
Since 4.0.0, you can also let the GA auto-mount them for you. To access the files and folders, you need to be in the vboxguest group. See the manual for more information.