Dear all, Here I only want to thank all of you in the support group,specially Marcus G. Daniels,Paul E. Johnson,and Steve Railsback. The problem that I mentioned in the letter"avcall error in 'make' swarm-2.2 underwindows XP" have been solved,I installed it successfully in a another computer. I can't imagine install it without your help!Thanks to all of you! have a good day!