This problem is usually caused by a conflict with the Com port to which the key is connected. There can be several causes:
The external serial port on your computer is not currently enabled. To check this, reboot your system and go into your system BIOS. Go to the section
that allows you to configure the integrated peripheral devices. Different Bios versions will label this in various ways. Some examples might be
"Integrated Peripheral Setup", "Integrated Peripherals", "Built-in Devices", etc. When you locate the appropriate section, make sure that both of the
two external serial ports are enabled. The first port should be configured as "Com1, 3f8(h)". The second external serial port should be set to "Com2,
2f8(h)". Exit the BIOS, saving the changes.
Once you have insured that your external serial ports are properly configured, the next step is to make sure that no other internal devices are using
one of the Com ports that the external serial ports are set to use. The most common source of conflict would be an internal modem. In your Windows
Control Panel, select "Modems". Highlight your modem, and click on the "Properties" button. If it is set to Com1 or Com2, you will want to reset it to
Com3 or Com4. Generally, if your mouse is on Com1, it's best to set the modem to Com4. If your mouse is on Com2, then Com3 is the best setting for the
modem. Check the documentation for your modem for instructions on resetting the Com port. Another possible conflict could be a serial MIDI driver,
such as that supplied with the Alesis QS6, or the Yamaha CS-1x. Remove any such drivers in the Windows Control Panel in the "Multimedia" section.
After you have insured that there are no conflicts, you will want to have Logic rescan your Com ports for the key. To do so, open the "Program
Files\Emagic\Logic" folder. For version 3.0 and before, double-click on the "_final.exe" file. This will scan the ports. If successful, you will see a
dialog box telling you that Logic Audio is installed, otherwise you will see the "Key Not Found..." dialog. If this happens, recheck the above, and
make sure that everything is as it should be. In version 3.5 or later, run the "Find Key" utility in the Logic program group in the Start Menu. If
"Find Key" detects the key, it will display a dialog box telling you on what port the key was found. If it fails to detect the key, a dialog box
informing you of this will be displayed. If you are still unable to resolve the problem, contact Emagic Tech Support.
If yah seem to have lost the key, yah can probably find a crack for it on the net
somewhere. I'm aware of a crack for the cubase sx dongle so I can't see why there wouldn't be one for logic.