Error While Receiving Response

Hello,

We have a standard page extended to launch payment gateway, page is launched and upon returning the call back to the page,we are facing an issue.

You are trying to access a page that is no longer active.

- The referring page may have come from a previous session. Please select Home to proceed.

And not able to recieve the response using the below code

pageContext.getParameter("responseObject"));

// The responseObject is a encrypted string.

The above line throws the below exception ( at xxtest.oracle.apps.pon.homepages.selling.webui.XxbapSellerHomeCO.processRequest(XxtestSellerHomeCO.java:64)) line 64 is above the line

oracle.apps.fnd.framework.webui.OARedirectException    at oracle.apps.fnd.framework.webui.OAPageContextImpl.forwardImmediatelyInternal(OAPageContextImpl.java:3063)    at oracle.apps.fnd.framework.webui.OADialogManager.redirectToTarget(OADialogManager.java:506)    at oracle.apps.fnd.framework.webui.OADialogManager.redirectToDialogPage(OADialogManager.java:154)    at oracle.apps.fnd.framework.webui.OADialogManager.displaySystemError(OADialogManager.java:966)    at oracle.apps.fnd.framework.webui.OAPageContextImpl.throwSecurityException(OAPageContextImpl.java:10212)    at oracle.apps.fnd.framework.webui.OAPageContextImpl.checkSecurity(OAPageContextImpl.java:9079)    at oracle.apps.fnd.framework.webui.OAPageContextImpl.checkSecurity(OAPageContextImpl.java:8942)    at oracle.apps.fnd.framework.webui.OAPageContextImpl.getParameter(OAPageContextImpl.java:1081)    at oracle.apps.fnd.framework.webui.OAPageContextImpl.getParameter(OAPageContextImpl.java:990)    at xxtest.oracle.apps.pon.homepages.selling.webui.XxtestSellerHomeCO.processRequest(XxtestSellerHomeCO.java:64)    at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:645)    at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:283)    at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processRequest(OAPageLayoutHelper.java:1503)    at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processRequest(OAPageLayoutBean.java:1588)    at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:1073)    at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:1040)    at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:704)    at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:283)    at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processRequest(Unknown Source)    at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:1073)    at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequestChildren(OAWebBeanHelper.java:1040)    at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processRequest(OAWebBeanHelper.java:704)    at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processRequest(OAWebBeanContainerHelper.java:283)    at oracle.apps.fnd.framework.webui.beans.OABodyBean.processRequest(OABodyBean.java:353)    at oracle.apps.fnd.framework.webui.OAPageBean.processRequest(OAPageBean.java:3270)    at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:2287)    at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:608)    at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:488)    at _pages.__oa._jspService(__oa.java:233)    at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)    at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)    at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)    at oracle.apps.jtf.cabo.interceptor.JTFWrapperFilter.doFilter(JTFWrapperFilter.java:151)    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)    at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:527)    at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:253)    at weblogic.servlet.jsp.PageContextImpl.forward(PageContextImpl.java:159)    at _pages.__rf._jspService(__rf.java:239)    at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)    at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)    at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)    at oracle.apps.fnd.security.WLFilter.doFilter(WLFilter.java:161)    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)