diff --git a/src/main/java/org/cafesip/sipunit/SipPhone.java b/src/main/java/org/cafesip/sipunit/SipPhone.java
index <HASH>..<HASH> 100644
--- a/src/main/java/org/cafesip/sipunit/SipPhone.java
+++ b/src/main/java/org/cafesip/sipunit/SipPhone.java
@@ -696,9 +696,6 @@ public class SipPhone extends SipSession implements SipActionObject,
         {
             msg = (Request) req_msg.clone();
             msg.setMethod(req_msg.getMethod());
-            ToHeader toHeader = (ToHeader) response.getHeader(ToHeader.NAME);
-            String toTag = toHeader.getTag();
-            ((ToHeader)msg.getHeader(ToHeader.NAME)).setTag(toTag);
         }
         catch (Exception ex)
         {
@@ -2717,4 +2714,4 @@ public class SipPhone extends SipSession implements SipActionObject,
         throw new Exception("Update contact info was null or blank");
     }
 
-}
\ No newline at end of file
+}
dont use respond's to-tag when authenticating

it breaks authenticating to proxy
and results in <I> Call/Transaction Does Not Exist