Am using OS X.3.5 and for about a week I am having trouble downloading. Get a message that says (after I click a download button) something such as ‘page cannot be opened ..........plugin cannot be found’.

Have contacted my DSL service and my DSL lines are clean. They block nothing. I am still able to surf the web and do email. I have no seourity set other than my router and built in firewall.

This is so strange.

Any one know what could be causing this?