After setting the Ir on at the 7650 and clicking the Deploy button I get an output message 'Open connection to: 1' and then after a couple of seconds an other message 'Connection failed'.

The midlet runs fine in the 'SunONEStudio Update1ME' + 'NokiaDevelopersSuite v1.1' emulator in Windows XP .
Also the IrDA connection between the 7650 and the PC integrated IrDA works fine e.g. with the 'PC suite for Nokia 7650'.

The size of the JAR file is 10kB.
There is no old MIDlet in the 7650 with the same name.
The 7650 version is 3.12 (18-06-02 NHL-2NA) and there is 247kB of free memory.