How does klonopin (clonazepam) work on serotonin? I've heard it can contribute to depression. How so?

Klonopin (clonazepam) Although klonopin's main action is on gaba-a receptors leading to inhibition of neuronal impulses, it also affects serotonin. It decreases 5ht utilization in the brain as well as egress of 5-hiaa from the brain. http://tinyurl.com/muqaacu it apparently upregulates serotonin transporters which do the opposite of ssri's -- take serotonin out of the synapse. Voila -- maybe more depression.