What are we doing wrong in Afghanistan?

Spending too much money on security for Westerners for starters according to a report published by Truthout. The report also gives us an idea why we've been so clueless:

There have been numerous attacks on foreigners in Kabul and suicide bombings have been effective from the Taliban's point of view in driving almost all expatriates into well-defended compounds where living conditions may be luxurious but which are as confining as any prison. This means that many foreigners sent to Afghanistan to help rebuild the country and the state machinery seldom meet Afghans aside from their drivers and a few Afghans with whom they work.