Yes you have the wrong IOS on either the 3750 or 3750x, and since the 3750x does not have a version that works with 12.2.25 (wich is old and have seriuous bugs in it) you need to upgrade the software on the 3750 to version 12.2.(55) SE3. to make them stackable together.
You need to use the same version to make things work.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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