Older IR-enabled Nokias are not compatible with the newer IrDA standards, so in order to make a connection, LogoManager must be able to have direct access to the IR port without any interference from the Windows IR drivers. This mode is known as DirectIR.
If you want to use more recent phones (8810, 8210, 8850 but not the 7110) and already have your system configured for DirectIR, or are using Windows NT, you may be able to persuade your phone to use DirectIR by activating '2 player snake' mode instead of the usual IR menu.