Silverlight - KeyNotFound Exception

Finally, I found out the reason for this exception in Silverlight. Though I had put try catch blocks in all the methods, sometimes this exception is thrown.
I had a doubt that it may be because of animation. And, it was.

I was using storyboard1 for opening canvas1 and storyboard2 for closing it.
And canvas1 opens when i do a mouse enter event to another canvas-canvas2. Similarly, canvas1 is closed in the mouseleave event of canvas2.
The exception was thrown only when I did a fast mouse enter and mouse leave(ie before storyboard1 ended and storyboard2 was called).
So, it is always better to stop all the storyboards modifying the control before beginning a storyboard for animating the control.

Server did not recognize the value of HTTP Header SOAPAction

This is a SOAP protocol exception. I got this exception when I tried to access a method in a webservice. The reason for getting this exception is that the method I accessed was not a web method.

The following is the exception that i recieved

soap:ClientSystem.Web.Services.Protocols.SoapException: Server did not recognize the value of HTTP Header SOAPAction: http://tempuri.org/GetFileString.
at System.Web.Services.Protocols.Soap11ServerProtocolHelper.RouteRequest()
at System.Web.Services.Protocols.SoapServerProtocol.RouteRequest(SoapServerMessage message)
at System.Web.Services.Protocols.SoapServerProtocol.Initialize()
at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing)