| UPGRADES & DOWNGRADES HISTORY |
| Date | Research Firm | Action | From | To | | 19-Feb-03 | HC Wainwright | Downgrade | Outperform | Monitor | | 24-Apr-02 | Bear Stearns | Initiated | | Attractive | | 19-Mar-02 | HC Wainwright | Upgrade | Accumulate | Buy | | 5-Dec-01 | Morgan Stanley | Initiated | | Neutral | | 24-Sep-01 | H.C. Wainwright | Initiated | | Accumulate | | 7-Sep-01 | Needham & Co | Downgrade | Buy | Hold | | 7-Sep-01 | AG Edwards | Downgrade | Accumulate | Maintain Position | | 29-Jun-01 | AG Edwards | Initiated | | Accumulate | | 11-May-01 | Robert W. Baird | Initiated | | Strong Buy |
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| Current Month | Last Month | Two Months Ago | Three Months Ago | | Strong Buy | 1 | 1 | 1 | 1 | | Buy | 0 | 0 | 0 | 0 | | Hold | 0 | 0 | 0 | 0 | | Underperform | 0 | 0 | 0 | 0 | | Sell | 0 | 0 | 0 | 0 |
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