Login failed for user 'NT AUTHORITYANONYMOUS LOGON'.

Hello, I am new to K2 and i just been playing around with smart objects and smart forms. I was able to create a smart form that stores data in a Sharepoint List, however when i try to do the same but on a sql database i get the error below. If i run the SQL smart object created by the SmartObject Tester from the SmartObject Tester it work flawlessly, but when i try it from the smartform i get the error. Any Ideas what is causing this issue.

 

Thanks

 

K2 Smartforms Error------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Login failed for user 'NT AUTHORITYANONYMOUS LOGON'.


•Type: SourceCode.SmartObjects.Client.SmartObjectException

•Source: SourceCode.SmartObjects.Client

•Method Base
◦Member Type: Method

◦Name: ExecuteScalar

◦Module
◾Scope Name: SourceCode.SmartObjects.Client.dll

◦Declaring Type
◾Full Name: SourceCode.SmartObjects.Client.SmartObjectClientServer

•Stack Trace:
at SourceCode.SmartObjects.Client.SmartObjectClientServer.ExecuteScalar(SmartObject smartObject, DataTable inputTable)

at SourceCode.Forms.AppFramework.FormRuntime.SmartObjectExecution(XPathNavigator nav, Boolean outputDependencies, SmartObjectClientServer svr)

at SourceCode.Forms.AppFramework.FormRuntime.WorkXmlToApi(String xml)

at SourceCode.Forms.Runtime.AJAXCall.ProcessRequest(HttpContext context)