Beofre attempting to go the wireless direction first make sure that the PS2 ports arent the culprit, as i suggsted before, try other types of mice. USB, Serial, if either works, then its most likely the port that is malfunctioning, and throwing more PS2 mice (including wireless combinations of mice and keyboards) at it wont help.
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Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.