>I have seen this many times, I don't know why, but the adapter does not >work with mice sometimes.When thoes adapters work with keyboard, they are >just fine, but don't do the same thing on mice. The PS/2 and normal keyboard are internally absolute the same, the only difference is in the type of connector, therefore you can use the adapter with any PS/2 keyboard and it will work. But PS/2 and serial mouses are internally different. They have different voltage and other things. So not all PS/2 mouses are designed to support the serial adapter. Michal Belicek Dezadata s.r.o., programmer mailto:[log in to unmask] The PCBUILD web site always needs good submissions. If you would like to contribute to the website, send any hardware tech tips or hardware reviews to: [log in to unmask]