That cease-fire never went into effect, independent observers say.

That cease-fire never went into effect, independent observers say. Instead the Myanmar army continued an intensive artillery assault on rebel positions. The Burmese military has advanced their positions even as they claim to be acting in self-defence
“It’s been a nonstop barrage,” said Ryan Roco, an American photographer documenting the fighting from the front lines. “It’s raining mortars.”
“As KIA troops have constantly launched such terrorist attacks, the Tatmadaw had to take military actions just to protect and safeguard the peace and tranquillity of the community and for the prevalence of law and order,
http://www.nytimes.com/2013/01/27/world/asia/myanmar-military-said-to-make-progress-against-rebels.html?_r=0