Rebooting / Target Disk Mode problem

[jmscalercio]

Hi, I just bought a new MBP and I have connected it to my iMac w/ Firewire in order to transfer over some large files. The problem is that my iMac always freezes when trying to reboot. I have already run Disk Utility and removed all login items, but am stuck on what could be causing the problem. Any ideas?

 

[mad jew]

At what point does it freeze? What sort of third party hardware does it have connected?