ajax beta 1.0 run well in firefox 2.0 , but does not work in IE6 SP1 (winXp or win2000)

I migrate my company website form atlas to ajax beta 1.0 ,but there are script erros in IE6 SP1 (winXP or win2000) when I call web serviece from javascript.the

win2000 OS is updated to SP4 and the winXP OS is updated to SP1,but ajax does not run. when some winXP pc OS is updated to SP2,ajax run well.

By compared, ajax run well in firefox 2.0.

there are many IE users who need my help to run my website ,but who can help me?

Hi,

ASP.NET team member, Chris Riccio has pointed that this problem maybe be caused by a bug in IE 6 SP1 concerning to HTTP compression. In fact, I was able to fix it installing the patch KB912812 on the clients.