Why did Roosevelt torpedo the London Economic Conference of 1933?

Roosevelt first agreed to send a delegation including Sec. of State CorDELL Hull. But since the conference's agenda didn't agree with his own he passed it up.

He wanted to concentrate primarily on the recovery of the American domestic economy and to stimulate American recovery with inflammatory policies. An agreement to maintain the dollar in terms of other currencies could have tied his hands.

While he was on his yacht off the New England coast he radioed a message to London scolding the conference for trying to stabilize currencies and declared America's withdrawal from negotiations. (source- "The American Pageant" A.P. and 13th edition by David M. Kennedy, Lizabeth Cohen and Thomas A. Bailey)