| UPGRADES & DOWNGRADES HISTORY |
| Date | Research Firm | Action | From | To | | 14-Dec-06 | Nollenberger Capital | Initiated | | Buy | | 17-Nov-04 | Wells Fargo Sec | Upgrade | Sell | Buy | | 18-Oct-04 | Wells Fargo Sec | Downgrade | Hold | Sell | | 17-Aug-04 | Wells Fargo Sec | Initiated | | Hold | | 24-Oct-02 | Adams Harkness | Downgrade | Strong Buy | Buy | | 15-Mar-02 | CE Unterberg Towbin | Initiated | | ST Buy/LT Buy | | 11-Jan-00 | Adams Harkness | Initiated | | Strong Buy | | 22-Nov-99 | Needham & Co | Upgrade | Buy | Strong Buy | | 16-Nov-99 | Janney Mntgmy Scott | Downgrade | Buy | Accumulate | | 21-Apr-99 | Needham & Co | Upgrade | Hold | Buy |
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| Current Month | Last Month | Two Months Ago | Three Months Ago | | Strong Buy | 0 | 0 | 0 | 0 | | Buy | 0 | 0 | 0 | 0 | | Hold | 0 | 0 | 0 | 0 | | Underperform | 0 | 0 | 0 | 0 | | Sell | 0 | 0 | 0 | 0 |
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