Upgrading from ESXi 5.1 to ESXi 5.1U1 skips all VIBs

Hi

I downloaded the update1 ZIP from here. https://download2.vmware.com/patch/software/VUM/OFFLINE/release-383-20130425-023671/update-from-esxi5.1-5.1_update01.zip…

From an SSH session I then used the command:

esxcli software vib update --depot=/vmfs/volumes/4ffc928f-b4cb5877-41f5-f46d04e56de9/Patches/update-from-esxi5.1-5.1_update01.zip

I then get the summary which says nothing was installed, nothing was removed and all VIBs were skipped:

Update Result

Message: Dryrun only, host not changed. The following installers will be applied: []

Reboot Required: false

VIBs Installed:

VIBs Removed:

VIBs Skipped: VMware_bootbank_ata-pata-amd_0.3.10-3vmw.510.0.0.799733, VMware_bootbank....

Any ideas?

Thanks.