VMWare Server depends on USBFS information to recognize USB devices and forward its communication to the virtual machine. OpenSuse switched off this feature by default. In order to re-enable it, you just need to make a slight change in your /etc/fstab file:
usbdevfs /proc/bus/usb usbfs auto 0 0
Usually the line already exists with noauto. Just change it as displayed above. This will mount the filesystem automatically at system start. If you don’t wanna reboot, you can mount the filesystem immediately with:
PS: This will propably work on every Linux distribution. A detailed description on this topic can be found at old openSuse’s Wiki.