The Politico answers that:
Democratic leaders have vowed to work through their differences in the coming weeks and held a series of meetings last week to try to forge a compromise. Although the White House said Friday that the nation was losing intelligence as a result of the act's expiration - a claim it subsequently softened - Republicans boycotted the talks, saying they were unnecessary and that the House should vote on the Senate-passed version of the bill.
So Republicans are doing their typical stomp the feet, temper-tantrum to try and get FISA passed the way they want. Good for the House Democrats on not blinking to the typical Republican bullying.