Page 1 of Simpsons Series 2 R1 sticks on Disk1 menu with Wharfedale 750s

Just got this excellent box set from CDWOW but disk 1 freezes once the menu loads, this is the second copy so it doesnt appear to be the DVD.
Anyone else having this problem on any other players or can offer a solution.
Does the R2 work any better on a Wharfedale 750s?

PC

On my Lg3200 it doesnt load the menu, seems to have a problem reading the disc. I have to push the "1" button to get it to load.