Access Question

I usually get into Zoho Writer on my iBook running Camino, OS 10.3.9. But yesterday I tried to access it from IE 5, iCab, and Opera in OS 9.2.2 (on a Powerbook G3) and, also on the PB G3, running OS 10.2.8, in Safari. In all cases I signed in and got as far as the page that loads from 1-100%. Sometimes it loaded to 100% but never showed anything else, and in other cases it only got as far as 1%.

Has anyone else experienced access problems like this? I can get to other web pages and do things fine on the older computer, but Zoho seems to require more. Do I need some kinds of plug-ins?

I'm grateful for any advice.
Pat