Ad agency

FCB San Francisco

resigned from

Amazon.com's

(AMZN) - Get Report

advertising account because of "fundamental disagreements with the direction that Amazon.com was taking for 2001."

FCB, a unit of Chicago's

True North Communications

(TNO)

, has been the ad agency for the Seattle online retailer since April 1997. The agency created a number of radio and television campaigns for Amazon, including the retro sweaterman advertisement.

Shares of Amazon.com lately slipped $2.25, or 9.5% in

Nasdaq

trading, to $21.38, while True North was down 31 cents, or 0.9%, to $36.50 on the Big Board.