If you have a Firewall running and your AS is not working (like mine didn't) then check out the links below at the MS AS help site.

http://www.microsoft.com/windowsmobi...t.mspx#desktop
On the side (or scroll down) MS has the following liks:

Sygate Personal Firewall
http://www.microsoft.com/windowsmobi...nc/sygate.mspx
TrendMicro PC-cillin Internet Security 2005
http://www.microsoft.com/windowsmobi...ync/trend.mspx
Norton Personal Firewall
http://www.microsoft.com/windowsmobi...nc/norton.mspx
Zone Alarm Security Suite
http://www.microsoft.com/windowsmobi...sync/zone.mspx
McAfee Personal Firewall
http://www.microsoft.com/windowsmobi...nc/mcafee.mspx
Windows Firewall
http://www.microsoft.com/windowsmobi...c/windows.mspx

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My PDA & SmartPhone History: Palm Vx; M505;TungstenT; NX60; iPaq 1910; I700; Treo 600; hx4700; MPx220; hw6515, Treo 700w, XV6700,, Treo 700p, Moto Q Black, Moto Q9h, BlackBerry 8310 & BlackBerry 8820, BlackBerry Bold, BlackBerry Storm 9530.