Check the articles that talk about how obedient Musharraf has been to US demands, how he got slapped at 2:00AM when he didn't go to jirga in Afghanistan, how he issued NRO so Benazir can come back. You need to read all the news from 2001 and beyond.
US didn't support Musharraf just to get entry into Pakistan for logistical support of its attack on Afghanistan, as any other current politician probably would've done the same thing.
You didn't answer my questions.