I want to change one Personal Geo-database projection to another. Kindly give me instructions to re-project vector data.
Here are two options that may help you:
note make sure Define Projection (Data Management) was not used to "change projection" from the source projection
Create a new feature dataset within a personal GDB and import your vector data
Once your feature classes are imported into your new feature dataset, they will automatically have the projection system you defined earlier.
To project feature classes with an existing projection system to a different projection system:
If you have tried these already, I may have a few more ideas for you.