does the system start up at all? even if for a second? Do fans spin up then down immediately? The OCZ psu's are very sensitive to grounding and will not power up if there is a grounding issue. Be sure to check how your system is mounted and be sure to use all brass standoffs. The psu must also have a minimal amount of load before it will start but seeing as though you have your system hooked up to it that should be enough. A last thing you could try to do is remove the psu from the system completely and try and jumpstart the psu out of the case. If it starts then then the problem lies somewhere in your system. If it doesn't im afraid to say the psu may be DOA. OCZ do have incredible customer service and will get you out a new psu if that is the case. They will even cross ship if you live in the US.
Here is the method to try and jumpstart your psu.
stick a looped wire into the black and green pins and you should be set.
Also check OCZ official forums if you haven't already for direct help on your issue.
Hope that helps.