Q: incorrect password

Not sure how this question relates to an Apple router, the products that you see just below that we support in this forum......but what troubleshooting steps have you taken on the iPad?

Did you "Forget" the current connection on the iPad and set things up again?

Work your way through the troubleshooting guide linked below:

If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network - Apple Support

If you are still having problems, you will need to post in the support forum for the iPad.

                                                  iPad