Proxy Class is fine when used in C# project but returns error when Used with SSIS

My proxy class returns web service responses well if I use it in a C# code.

I compile it with CSC and put it in GAC to use it with SSIS.

Then I get web service response with some field values populated with "Exception of type :{System.InvalidOperationException "' occured.

Here is the part of web service response received by the C# program:

Name		Value	Type
mainAddress		{Address}	Address
	city	Metuchen	string
	cityField	Metuchen	string
	country	USA	Country
	countryField	USA	Country
	state	NEW_JERSEY	State
	stateField	NEW_JERSEY	State

Here is the same object returned by compiled dll used in SSIS:

mainAddress		{BrokerConnectServiceV1.Address}	BrokerConnectServiceV1.Address
	city	Metuchen	String
	country		{System.Nullable(Of BrokerConnectServiceV1.Country)}	System.Nullable(Of BrokerConnectServiceV1.Country)
		HasValue	FALSE	Boolean
		Value	Exception of type: '{System.InvalidOperationException}' occurred.	BrokerConnectServiceV1.Country
			Data	{System.Collections.ListDictionaryInternal}
			HelpLink	Nothing
			InnerException	Nothing
			Message	Nullable object must have a value.
			Source	mscorlib
			StackTrace	at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) at System.Nullable`1.get_Value()
			TargetSite	{System.Reflection.RuntimeMethodInfo}
	state		{System.Nullable(Of BrokerConnectServiceV1.State)}	System.Nullable(Of BrokerConnectServiceV1.State)
		HasValue	FALSE	Boolean
		Value	Exception of type: '{System.InvalidOperationException}' occurred.	BrokerConnectServiceV1.State

Below is another posting by my associate on the same issue :

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=536615&SiteID=1

Any help is appreciated....

[21397 byte] By [Gulden] at [2007-12-22]