[GaryWT]

Going off of the above post and assuming you have gas in both tanks... did you just top them off or did you do it before you put the trailer away?

Anyway, turn off both tanks, disconnect both tanks, check connections to be sure everything is clean. Reconnect, be sure the switch is pointing to one tank or the other, slowly turn on both tanks. Slowly turn on one burner one the stove and see if you can light it. If not, switch over to the other tank by turning the switch at the tanks to point to the other one and try to light the burner again.

Good luck.