SoapHttpClientProtocol.Invoke hangs when calling web service from worker thread -- only in debugger!?

Hi, I have a web service called GetComputerNameAndDescription which I can
call from the main thread of my app. If I call it from a separate thread,
however, it hangs on the call to Invoke() -- but only if I'm in the
debugger. Here's a stack trace with non-user code shown -- the call to
RegisterNotifySource, at the top of the stack, never returns -- I have to do
a "break all" inside the debugger, then find this thread and examine its
call stack in order to get this output.

Anyone have any ideas what's going on here?

Thanks

Greg Hassett

00000000()

system.web.services.dll!System.Web.Services.Unsafe NativeMethods.RegisterNoti
fySource(System.Web.Services.Interop.INotifyConnec tion2 connection =
{System.__ComObject}, System.Web.Services.Interop.INotifySource2 source =
{System.Web.Services.Protocols.RemoteDebugger}) + 0x1e bytes

system.web.services.dll!System.Web.Services.Protoc ols.RemoteDebugger.get_Not
ifySink() + 0x2d bytes

system.web.services.dll!System.Web.Services.Protoc ols.RemoteDebugger.NotifyC
lientCallOut(System.Net.WebRequest request = {System.Net.HttpWebRequest}) +
0x3d bytes

system.web.services.dll!System.Web.Services.Protoc ols.WebClientProtocol.GetW
ebRequest(System.Uri uri = {System.Uri}) + 0xdd bytes

system.web.services.dll!System.Web.Services.Protoc ols.HttpWebClientProtocol.
GetWebRequest(System.Uri uri = {System.Uri}) + 0x22 bytes

system.web.services.dll!System.Web.Services.Protoc ols.SoapHttpClientProtocol
..GetWebRequest(System.Uri uri = {System.Uri}) + 0x1e bytes

system.web.services.dll!System.Web.Services.Protoc ols.SoapHttpClientProtocol
..Invoke(string methodName = "GetComputerNameAndDescription", System.Object[]
parameters = {Length=2}) + 0x75 bytes

cheebyservice.dll!CheebyService.AdelaP2PWebService s.AccountManager.AccountMa
nager.GetComputerNameAndDescription(string encryptionId =
"998eea01c0ad4f019ecaec74785053c3", string encryptedMacAddress =
"ZOG2U5DFoV39V+6VEcJCIoE0WD5Ej65qM5e+M8+XY0Jx0d3e2 1x4UpeoEIDYkODFY8wXRAayul9
KOZyqS3JsxSQa8JyWD5ddtEUd2XuHNh72XFDd/3tw9SYVitPCSic10w7ywX1J60xPfo8OxV/KAUl
N61XYvmIbHgobOIQsnjY=", string name = null, string description = null) Line
459 + 0x3c bytes C#

cheebyservice.dll!CheebyService.ConnectionService. GetComputerNameAndDescript
ion(string name = null, string description = null) Line 906 + 0x2b bytes C#

cheebyservice.dll!CheebyService.CommandProcessors. ConnectionServiceManager.e
xecuteCommand(CheebyService.Service cs = {CheebyService.SvcLocal},
System.Xml.XmlNode node = {System.Xml.XmlElement}) Line 75 + 0x26 bytes C#
cheebyservice.dll!CheebyService.SvcLocal.executeCo mmand(System.Xml.XmlNode
commandNode = {System.Xml.XmlElement}) Line 95 + 0x16 bytes C#

cheebyservice.dll!CheebyService.SvcLocal.Handler(S ystem.Net.Sockets.TcpClien
t tcpClient = {System.Net.Sockets.TcpClient}, string xmlParams) Line 55 +
0xc bytes C#
cheebyservice.dll!CheebyService.Service.HandlerMet hod() Line 243 C#