It certainly sounds like this problem is browser based ... a setting or something. I have experienced sites that would not load in one browser but work fine in another. Or if the browser version is a little old and the site has been updated for the latest version. We have used the trademark website before ... but usually with Firefox which is our standard browser.
My suggestion would be to give it a try once more in Firefox.
I would doubt that there is any issue on there end ... when you submit the form it probably never makes it through because the browser isn't letting it.
Good luck ..
Real World Machine Shop Software at