How can I access old post for the year 2006?...Thanks in advance for the help...

At the top of the Forum you will see a "control" that lest you pick previous pages of posts. At the moment this control says there are 95 pages. You could continue to click the "right most" page until you get back to 2006 - which I admit is rather slow.

Alternatively, if you're looking for a specific post or topic, use the [Search] feature - just above the calendar to the right.