The story, as far as I have read from this article and others, was they asked for data(probably with an NSL), he said no. They got a court order. He said no. At some-point he was willing to cooperate, but by that point, they didn't care because they thought he was jerking them around.They then requested the SSL keys. This article is more clear about the exact sequence of events[0], but the the posted one says so as well. The initial request was not for the SSL keys.
From the newyorker article :
"On June 10th, the government secured an order from the Eastern District of Virginia. The order, issued under the Stored Communications Act, required Lavabit to turn over to the F.B.I. retrospective information about one account, widely presumed to be that of Snowden. (The name of the target remains redacted, and Levison could not divulge it.) The order directed Lavabit to surrender names and addresses, Internet Protocol and Media Access Control addresses, the volume of each and every data transfer, the duration of every “session,” and the “source and destination” of all communications associated with the account. It also forbade Levison and Lavabit from discussing the matter with anyone.
"
Sometime after his initial refusal and then offer to comply with some caveats that the fed's interpreted as stalling:
"Prior to the hearing on July 16th, the U.S. Attorney filed a motion for civil contempt, requesting that Levison be fined a thousand dollars for every day that he refused to comply with the pen-register order. EARLIER IN THE DAY, Hilton issued a search-and-seizure warrant, authorizing law enforcement to seize from Lavabit “all information necessary to decrypt communications sent to or from [the account], including encryption keys and SSL keys,” and “all information necessary to decrypt data stored in or otherwise associated with [the account].” (emphasis mine)
[O]http://www.wired.com/threatlevel/2013/10/lavabit_unsealed/