Strange problem on MacBook---javascript??

Hi every body, I don't know if you know but the Zap2it TV listings changed recently now they're owned by Gracenote. Now I have a weird problem on my MacBook: I can view the listings grid, but if I try to search for a program or if I click on a program in the listings grid and then click in the expanded description to see upcoming episodes I get a Page Not Found. This happens in Firefox and Safari and Chrome. I turned off all the add-ons in Firefox on my MacBook but it still doesn't work and anyway like I said it doesn't work in Safari or Chrome either.
I even copied the link to a details page and pasted it right into the browser and I still got Page Not Found. Like this one:
https://tvlistings.gracenote.com/overview.html?programSeriesId=SH00270848&tmsId=EP002708480133
I tried the same thing on my iMac and it works fine! Both Firefox and Safari.
It seems like there must be some wrong setting on my Macbook, or maybe I don't have the right javascript? Both computers have the same version of MacOS and the same versions of FF and Safari.
I keep my Macbook in the living room so I'd sure like to be able to use it to get TV info and not have to go into the other room to my iMac. Any ideas???