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....