Does anyone use a PSP to remote play their PS3.

I have it all set up and it works great connecting via my private network. However when I do a connect over internet it work for about a minute of so then all the graphics go screwy and illegible.

I have read that Sony released an update to fix the Vidzone streaming which "apparently" also closed a loophole for the ORP hombrew. I was wondering if this is the problem and they have inadvertantly denied legitimate users the use of this feature.

My PSP and the PS3 both have the official and up to date firmwares.

Any ideas anyone