Hi, I'm using Photoshop CS2 and have a really annoying problem with the vanishing point filter.

I am using vanishing point to add different carpet tile patterns onto the floor of a room set image. To do this I am creating the pattern in a seperate document as a birds eye view (this is quite a large file). I then copy this, open vanishing point and paste.
The annoying thing is after opening photoshop this method will work for the first 2 maybe 3 patterns but on the fouth the vanishing point filter just wont open. If i try to copy just half the pattern it will open and as i go on it then wont even open with half the pattern copied so i have to copy a quater of the pattern until it gets to a point where i have to restart photoshop and 'hey presto' it will now copy the full pattern over into vanishing point!

After each pattern I complete i make sure to purge the history and clipboard and i have no other programs open at the same time.

So my question is why will it work for the first three but not anymore?!

Any help would be greatly appreciated.