Silverlight WCF Service Error

Hi,

What would prevent one machine from consuming a Silverlight Enabled WCF service some of the time, whilst another on the same network domain, behind the same proxy / firewall / etc.. can fine? Service and app are on the same domain.

I'm writing to the event log when the service comes in, and I can't even see the call come through.

Any pointers greatly appreciated.

Update: After using fiddler, it seems to work if we have fiddler running, but not if we don't. I'm more confused than ever!

From stackoverflow

• Install Fiddler and see what is going on. No other good way to figure this out (sometimes even fiddler can't help).

  DeletedAccount : Where would you put fiddler? On the machine running the silverlight app I guess... Good suggestion tho, I'll give it a shot today - thanks! :o)

• The lesson is never believe what your told. The proxy on the non-working machine was indeed different. :o\

  Fiddler drops itself into the proxy chain and that's what caused it to work whilst fiddler was running.

  Case sovled.