Ubuntu :: Can't Create VDI In Virtualbox

this is for Ubuntu 10.4 i cant create a VDI or anything else beyond that point without root access, however if i open virtualbox with sudo privileges from the terminal(which ive already went through), once i go to open it normally from the launcher in the Applications list those changes arent there. here is the error i get

Code:

Failed to create the hard disk storage test.vdi.
Could not create the directory
'/home/marcus/.VirtualBox/HardDisks' (VERR_ACCESS_DENIED).

[code]....

in 8.04 we use to have an option in the System tab for applying access to non root users, but in 10.4 the only similar option is User Groups, an the only options that seem similar to this issue is "mount user space file systems" and "use virtualbox virtualization solutions" neither of which have any effect. is there a new way to apply non root users with root access in 10.4?