installation of vbox failing

Hi,

I am using compaq t5207tu model with 60gb harddisk and 2.5gb RAM.Its dual boot-Windows XP and Solaris. I tried installing SUN xVM on solaris to make client -server architecture (32 bit processor and 32 bit OS ) -guest OS (solaris 10)on host OS(Solaris 10). But whenever i try to install virtualbox, i get following below error...Plz advice

executing postinstall script.
Configuring VirtualBox kernel modules...
devfsadm: driver failed to attach: vboxdrv
Warning: Driver (vboxdrv) successfully added to system but failed to attach
can't load module: No such device or address
## Aborting due to attach failure.
## Configuration failed. Aborting installation.
pkgadd: ERROR: postinstall script did not complete successfully

Installation of <SUNWvbox> partially faile

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