my electric water heater keeps tripping the circuit breaker

nothing changed with the set up so i'm confused on why it's doing this.

this is the kind of circuit breaker i have (2 of them)
[img]http://homehardware.ca/products/300/36445141.jpg[/img]

sadly nat gas isn't available or i'd go with that.

water heater is at least 10 years old.