Does anyone know if there is a region lock on the Remote Play facility? I've got a first-gen 60gb US PS3, running firmware 2.10, and two first-gen PSPs, both running 3.90 M33 - one US, one European. For some reason, the US PSP will connect perfectly across my home network, whilst the Euro PSP doesn't want to know - it pairs OK on the PS3 registered devices list, but when I go to enable remote play on the PSP, I always get the following error:

"The PS3 system that this system is registered with was not found.
Check that you have selected [Network] > [Remote Play] on the PS3 system."

I've even tried changing the PSP's region in the M33 recovery menu, to no avail.

Anyone got any ideas?