Question about Kensington Expert Mouse Trackball

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Limited response with Expert Mouse

I have an Expert Mouse 64215 V5.0 Ser No 26960309BD which I am trying to use on a Dell Dimension 2400 via the standard 9-pin serial port. [I use an Expert Mouse 64325 USB on another machine and am trying to replicate the functions for consistency - apart from scrolling, of course]. The latest version of Mouseworks (6.2) does not recognise any Kensington pointing device. However, V5.6 'sees' the 64215 (Serial port 0, IRQ 248, 4 Byte Protocol) but only responds to single button clicks - it does not respond to chording on either pair of buttons, nor can I assign 'Middle-click' within AutoCAD (my main application), though 'Drag' operates as normal for 'All other programs'. In addition, any custom settings are lost on rebooting the machine. I have tried attaching the 64215 to the PS/2 mouse port via an adapter but then the device is not even recognised. What can I do to access the full capabilities of the 64215? I have sent this query three times to Kensington via their websites - twice to '' and once to Kensington US and each time it comes back as 'Delivery failure' with the target '' It would seem that Kensington have no interest in supporting their products.

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  • wcc1954 Nov 14, 2008

    Hi Cadmaster, I've got the exact same situation. Did your valiant efforts yield a reward?





1 Answer

The correct address is
or you can fill out the online form.

Many Thanks

Posted on May 20, 2008


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