My iPad doesn't support my Bose 123 system. My music used to play ok., but recently it keeps stopping. My wife's iPad also. Help

I connect my iPad to the auxiliary input on my Bose 123system. Previously, the I pad indicated that it didn't support the Bose, but the music played without interruption. Now the music keeps stopping. My wife's iPad does the same. My iPad is model no. Mb293b. Version 5.1.1 9b206. My wife's iPad is 6 months old.

Help!.