I have an orchestration published as a webservice. Everything went on fine, 
until I called the webservice. I looked up google and found an article that 
spoke about changing permissions to c:\Windows\Temp. The funny part is I hav
e all permissions set right, even tried giving full access to "Everyone". An
other orchestration published as a WS in the same projects works fine. The e
xception it threw is below. The DLL name changes everytime.

An unhandled exception of type 'System.Web.Services.Protocols.SoapException'
 occurred in system.web.services.dll

Additional information: System.Web.Services.Protocols.SoapException: Server 
was unable to process request. ---> System.IO.FileNotFoundException: File or
 assembly name sx_fas-r.dll, or one of its dependencies, was not found.
File name: "sx_fas-r.dll"
   at System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBas
e, Boolean isStringized, Evidence assemblySecurity, Boolean throwOnFileNotFo
und, Assembly locationHint, StackCrawlMark& stackMark)
   at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Bool
ean stringized, Evidence assemblySecurity, StackCrawlMark& stackMark)
   at System.Reflection.Assembly.Load(AssemblyName assemblyRef, Evidence XXX
emblySecurity)
   at System.CodeDom.Compiler.CompilerResults.get_CompiledAssembly()
   at System.CodeDom.Compiler.CompilerResults.get_CompiledAssembly()
   at System.Xml.Serialization.Compiler.Compile()
   at System.Xml.Serialization.TempAssembly..ctor(XmlMapping[] xmlMappings)
   at System.Xml.Serialization.XmlSerializer.FromMappings(XmlMapping[] mappi
ngs)
   at System.Web.Services.Protocols.SoapServerType..ctor(Type type, Protocol
sEnum versionsSupported)
   at System.Web.Services.Protocols.SoapServerProtocol.Initialize()
   at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, 
HttpContext context, HttpRequest request, HttpResponse response, Boolean& ab
ortProcessing)

=== Pre-bind state information ===
LOG: Where-ref bind. Location = C:\WINDOWS\TEMP\sx_fas-r.dll
LOG: Appbase = file:///c:/inetpub/wwwroot/BizTalkServices
LOG: Initial PrivatePath = bin
Calling assembly : (Unknown).
===

LOG: Policy not being applied to reference at this time (private, custom, pa
rtial, or location-based assembly bind).
LOG: Attempting download of new URL file:///C:/WINDOWS/TEMP/sx_fas-r.dll.

   --- End of inner exception stack trace ---

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OK. After a few hours I found out that one of my message type is an ArrayLis
t. If I don't use ArrayList, the webservice call goes through fine. So I bel
eive ArrayList must not be an xml-serializable type, though it's API clearly
 says it's xml-serializable.

My requirement is that I just need to send a simple array of objects, say my
Obj[] from my orchestration. How can I create a message of type simple array
. 

Help please.

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