diff --git a/mailnews/imap/src/nsImapIncomingServer.cpp b/mailnews/imap/src/nsImapIncomingServer.cpp
index 88a87015c6c3..e742fd1164c5 100644
--- a/mailnews/imap/src/nsImapIncomingServer.cpp
+++ b/mailnews/imap/src/nsImapIncomingServer.cpp
@@ -167,18 +167,19 @@ nsImapIncomingServer::GetImapConnectionAndLoadUrl(nsIEventQueue*
     rv = CreateImapConnection(aClientEventQueue, aImapUrl, &aProtocol);
     if (NS_FAILED(rv)) return rv;
 
-    if (aUrlListener)
-        aImapUrl->RegisterListener(aUrlListener);
+	nsCOMPtr<nsIMsgMailNewsUrl> mailnewsurl = do_QueryInterface(aImapUrl, &rv);
+    if (NS_SUCCEEDED(rv) && mailnewsurl && aUrlListener)
+        mailnewsurl->RegisterListener(aUrlListener);
 
     if (aProtocol)
     {
-        rv = aProtocol->LoadUrl(aImapUrl, aConsumer);
+        rv = aProtocol->LoadUrl(mailnewsurl, aConsumer);
         // *** jt - in case of the time out situation or the connection gets
         // terminated by some unforseen problems let's give it a second chance
         // to run the url
         if (NS_FAILED(rv))
         {
-            rv = aProtocol->LoadUrl(aImapUrl, aConsumer);
+            rv = aProtocol->LoadUrl(mailnewsurl, aConsumer);
         }
         else
         {
@@ -196,7 +197,7 @@ nsImapIncomingServer::GetImapConnectionAndLoadUrl(nsIEventQueue*
     }
     if (aURL)
     {
-        *aURL = aImapUrl;
+        *aURL = mailnewsurl;
         NS_IF_RELEASE(*aURL);
     }
 
@@ -232,7 +233,9 @@ nsImapIncomingServer::LoadNextQueuedUrl()
                                                &protocolInstance);
             if (NS_SUCCEEDED(rv) && protocolInstance)
             {
-                rv = protocolInstance->LoadUrl(aImapUrl, aConsumer);
+				nsCOMPtr<nsIURL> url = do_QueryInterface(aImapUrl, &rv);
+				if (NS_SUCCEEDED(rv) && url)
+					rv = protocolInstance->LoadUrl(url, aConsumer);
                 m_urlQueue->RemoveElementAt(0);
                 m_urlConsumers.RemoveElementAt(0);
             }
diff --git a/mailnews/imap/tests/harness/imapProtocolTest.cpp b/mailnews/imap/tests/harness/imapProtocolTest.cpp
index 76a82ea77725..f6613fe6d43c 100644
--- a/mailnews/imap/tests/harness/imapProtocolTest.cpp
+++ b/mailnews/imap/tests/harness/imapProtocolTest.cpp
@@ -66,6 +66,7 @@
 #include "nsIRDFResource.h"
 #include "nsCOMPtr.h"
 #include "nsMsgBaseCID.h"
+#include "nsIMsgMailNewsUrl.h"
 
 #ifdef XP_PC
 #define NETLIB_DLL "netlib.dll"
@@ -503,9 +504,9 @@ nsresult nsIMAP4TestDriver::OnRunIMAPCommand()
 	if (NS_SUCCEEDED(rv) && m_url)
     {
         m_url->SetImapLog(this);
-
-		rv = m_url->SetSpec(m_urlString); // reset spec
-		m_url->RegisterListener(this);
+		nsCOMPtr<nsIMsgMailNewsUrl> mailnewsurl = do_QueryInterface(m_url);
+		rv = mailnewsurl->SetSpec(m_urlString); // reset spec
+		mailnewsurl->RegisterListener(this);
 
     }
 	
@@ -633,13 +634,14 @@ nsresult nsIMAP4TestDriver::OnTestUrlParsing()
 		else
 			urlSpec = PR_smprintf("imap://%s", hostName);
 
-		imapUrl->SetSpec("imap://nsmail-2.mcom.com:143/test");
+		nsCOMPtr<nsIMsgMailNewsUrl> mailnewsurl = do_QueryInterface(imapUrl);
+		mailnewsurl->SetSpec("imap://nsmail-2.mcom.com:143/test");
 		
 		const char * urlHost = nsnull;
 		PRUint32 urlPort = 0;
 
-		imapUrl->GetHost(&urlHost);
-		imapUrl->GetHostPort(&urlPort);
+		mailnewsurl->GetHost(&urlHost);
+		mailnewsurl->GetHostPort(&urlPort);
 
 		printf("Host name test: %s\n", PL_strcmp(urlHost, hostName) == 0 ? "PASSED." : "FAILED!");
 		if (port > 0) // did the user try to test the port?