The guy(s) at diyledexpress.com say there is no problem with their site. they use a shared host with other web sites, and one or more of the users that share the host (a common IP address) have problems. but they tell me that their site is ok.
unfortunately (for them!) their site causes my anti-virus software to block the site. (I actually have 2 pieces of software installed, and BOTH flag the site.)
I have a notebook from work that uses another anti-virus software product that does NOT block this site. (but my company seems to think it is doing a satisfactory job...)
Your browser is not the problem, but you might disable your AV software when trying to visit the site.