2006 Honda Odyssey aux/xm button not working?

Hi, I have a 2006 Odyssey. The aux/xm button has stopped doing anything, regardless of whether an iPod is plugged into the glove-box auxiliary port. When an iPod is plugged in, the iPod shows as charging, but depressing the aux/xm button doesn't load the iPod. The AM, FM, and CD buttons are all working fine.

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