diff --git a/constants.h b/constants.h
index fbd674f..54d7372 100644
--- a/constants.h
+++ b/constants.h
@@ -229,8 +229,8 @@
 #define CODE_update_encrypted_messages_read 0x38fe25b7
 #define CODE_encrypted_chat_empty 0xab7ec0a0
 #define CODE_encrypted_chat_waiting 0x3bf703dc
-#define CODE_encrypted_chat_requested 0xfda9a7b7
-#define CODE_encrypted_chat 0x6601d14f
+#define CODE_encrypted_chat_requested 0xc878527e
+#define CODE_encrypted_chat 0xfa56ce36
 #define CODE_encrypted_chat_discarded 0x13d6dd27
 #define CODE_input_encrypted_chat 0xf141b5e1
 #define CODE_encrypted_file_empty 0xc21f497e
@@ -258,6 +258,7 @@
 #define CODE_input_encrypted_file_big_uploaded 0x2dc173c8
 #define CODE_update_chat_participant_add 0x3a0eeb22
 #define CODE_update_chat_participant_delete 0x6e5f8c22
+#define CODE_update_dc_options 0x8e5e9873
 #define CODE_input_media_uploaded_audio 0x61a6d436
 #define CODE_input_media_audio 0x89938781
 #define CODE_input_media_uploaded_document 0x34e794bd
@@ -377,4 +378,5 @@
 #define CODE_init_connection 0x69796de9
 #define CODE_invoke_with_layer9 0x76715a63
 #define CODE_invoke_with_layer10 0x39620c41
+#define CODE_invoke_with_layer11 0xa6b88fdf
 #endif
diff --git a/queries.c b/queries.c
index edbae9c..537c324 100644
--- a/queries.c
+++ b/queries.c
@@ -318,7 +318,7 @@ void out_random (int n) {
 
 int allow_send_linux_version;
 void do_insert_header (void) {
-  out_int (CODE_invoke_with_layer10);
+  out_int (CODE_invoke_with_layer11);  
   out_int (CODE_init_connection);
   out_int (TG_APP_ID);
   if (allow_send_linux_version) {
@@ -2422,6 +2422,7 @@ void do_send_create_encr_chat (void *x, unsigned char *random) {
 int get_dh_config_on_answer (struct query *q UU) {
   unsigned x = fetch_int ();
   assert (x == CODE_messages_dh_config || x == CODE_messages_dh_config_not_modified || LOG_DH_CONFIG);
+  logprintf ("old = %d\n", encr_param_version);
   if (x == CODE_messages_dh_config || x == LOG_DH_CONFIG)  {
     int a = fetch_int ();
     int l = prefetch_strlen ();
@@ -2432,7 +2433,7 @@ int get_dh_config_on_answer (struct query *q UU) {
 
     BIGNUM *p = BN_bin2bn ((void *)s, 256, 0);
     assert (check_DH_params (p, a) >= 0);
-    BN_free (p);
+    BN_free (p);      
   }
   if (x == LOG_DH_CONFIG) { return 0; }
   int l = prefetch_strlen ();
diff --git a/structures.c b/structures.c
index 3c88a24..014a8e9 100644
--- a/structures.c
+++ b/structures.c
@@ -342,14 +342,14 @@ void fetch_encrypted_chat (struct secret_chat *U) {
       memcpy (g_key, s +  (l - 256), 256);
     }
     
-    l = prefetch_strlen ();
+    /*l = prefetch_strlen ();
     s = fetch_str (l);
     if (l != 256) { logprintf ("l = %d\n", l); }
     if (l < 256) {
       memcpy (nonce + 256 - l, s, l);
     } else {
       memcpy (nonce, s +  (l - 256), 256);
-    }
+    }*/
     
     if (x == CODE_encrypted_chat) {
       fetch_long (); // fingerprint
@@ -393,14 +393,14 @@ void fetch_encrypted_chat (struct secret_chat *U) {
       memcpy (g_key, s +  (l - 256), 256);
     }
     
-    l = prefetch_strlen ();
+    /*l = prefetch_strlen ();
     s = fetch_str (l);
     if (l != 256) { logprintf ("l = %d\n", l); }
     if (l < 256) {
       memcpy (nonce + 256 - l, s, l);
     } else {
       memcpy (nonce, s +  (l - 256), 256);
-    }
+    }*/
    
     if (x == CODE_encrypted_chat_requested) {
       return; // Duplicate?