OVF imports but gives disk error on power-on

Fellows,

We just imported an .ova file using the vSphere Client GUI

successfully. But when we try to power on the VM, the VM console only shows

"A disk error" and nothing else. This is a time-sensitive production

pilot and does not look good!

Anyone experienced this before? Couldn't find anything on

the topic.

The .ova was created using the same version of vCenter at

another site.

thanks