Sometimes a purchased license will not successfully overwrite previous trial licenses. When this happens, the license installer will appear to install successfully, but the software will complain that it cannot find a valid license.
If you have only one ActiveState product installed on your system (excepting language distributions), you can manually delete the license file and re-run the installer. The license file has an ".lic" extension, and is located in "\Documents and Settings\\Application Data\ActiveState".
If you are running Windows NT, check the license location. If it is installed at "\winnt\profiles\USER\ApplicationData\ActiveState.lic", delete the license and install to "\Documents and Settings\\Application Data\ActiveState".
If you have multiple ActiveState products installed on your system, do not delete the license file unless you are prepared to re-run the license installer for all ActiveState products. If you need further assistance, please contact technical support.