problems accessing www.slide.com

[#1]

hi there, recently switched from orange broadband to plusnet.  everything si great except for some reason i can no longer load www.slide.com from safari?
if i use firefox it will load but not display my picture slides properly.
any idea what could be causing this?

[#2]

Won't be anything to do with the ISP. There is lots of Javascript on there - is that enabled in the security settings? In Firefox, go to Tools - Options - Content tab, check the box next to "Enable Javascript" is ticked.

[#3]

I can get to Slide in F/F and Safari here with no issues.
Did you take a new router from PN or are you using the one you had with Orange? If it's the latter have you changed your DNS settings to not use Orange's anymore?