rockykk - 5:23 pm on Sep 26, 2004 (gmt 0)

I have lost 50% of my traffic on 9 Sep and 90% on 23 Sep. My back links are same as it was before 9th Sep, Number of pages in Google are same, No change in PR but traffic is going down.
I am scared.
Do we have to think about new SEO Techniques?