Pakistan's decision to replace its intelligence chief moves toward addressing a long-held U.S. concern about the country's ability to fight border-area militants attacking in Afghanistan, but may not succeed on its own. The Bush administration, wary of inflaming anti-U.S. sentiment in Pakistan, has been quiet in responding to the appointment this week of Lt.-Gen. Ahmed Shujaa Pasha as director-general of the Inter-Services Intelligence (ISI) Directorate. But one U.S. official said Pasha, a former head of military operations, is strongly qualified for the job. In making the move, Pakistan's army chief Gen. Ashfaq Kayani put in place an ally with experience in border areas that Taliban and al Qaeda militants have made their hideout, the U.S. official and terrorism analysts said. That could strengthen the Pakistan military's hand in fighting the militants, whose attacks against U.S.-led forces in Afghanistan are on the increase. "He (Pasha) comes to the job with serious qualifications. He knows military operations and knows tribal areas. He is also close to Gen. Kayani and has spoken publicly about the danger that extremism poses to Pakistan. But that said, ultimately what counts most are actions on the ground," the U.S. official said. But even with this move Pak government still has not shown the will the US is looking for to eliminate the militant threat. A major test will be whether Pakistan can capture or kill a senior fighter, said Bryan Glyn Williams, a University of Massachusetts at Dartmouth professor who has testified as an expert witness at a Guantanamo terrorism trial. "They have been catastrophically incapable of getting high-level Taliban targets. This is how Pasha can prove that he's serious," Williams said. The US has grown increasingly alarmed over the strength of the border-area militants. It has drawn sharp criticism from Pakistan for strikes against the militants inside Pakistani territory using unmanned aircraft, or, in at least one case, Special Forces commandos. U.S. officials fear the ISI may be playing a double-game, backing the Taliban and other militants as allies to gain leverage in Afghanistan and Indian Kashmir. Washington has privately urged Pakistan's six-month-old civilian government to exert more control over the agency. White House spokesman Gordon Johndroe declined to comment on Pasha's appointment. "That's an internal matter to Pakistan," Johndroe said. Pentagon spokesman Geoff Morrell also declined to discuss the appointment, but said, "We are encouraging of the Pakistani government's reorganizing itself as necessary to take on the threat emanating from the tribal areas." Hassan Abbas, a Harvard University research fellow and former border-area Pakistani police chief, called Pasha's appointment a "very important move." He cited Pasha's service with U.N. peacekeeping, experience as director of army operations in a border region, and his ties to Kayani. "This choice shows that Asif Ali Zardari is providing Kayani every chance to strengthen his hold in (the) army and confront the terrorists strongly," he said. Abbas said the next six months would tell whether Zardari's strategy is working. The United States may have to boost quiet pressure on Zardari to succeed in shutting down support for the militant fighters that extends to high levels of the government, said terrorism analyst Seth Jones of the Rand Corp.