diff --git a/database/packages/pck_net_storage.pkb b/database/packages/pck_net_storage.pkb
index d4c0112..7c575e5 100644
--- a/database/packages/pck_net_storage.pkb
+++ b/database/packages/pck_net_storage.pkb
@@ -131,6 +131,8 @@ create or replace package body pck_net_storage as
         l_header_index    number := 1;
         l_content_length  number;
     begin
+        -- headers zurücksetzen - nur zur Sicherheit, damit keine alten Header übertragen werden.
+        apex_web_service.g_request_headers.delete;
 
         if i_content_type is not null
         then
@@ -159,10 +161,13 @@ create or replace package body pck_net_storage as
         l_header_index := l_header_index + 1;
         */
 
-        -- nur für BLOB (z.B. leerer Ordner) Content-Length setzen
-        if i_body_blob is not null
+        -- nur für leere BLOBs (z.B. leerer Ordner) Content-Length setzen
+        -- bei nicht leeren blob setzt apex_web_service.make_rest_request den content-length header automatisch, doppeltes setzen führt aber zu einem HTTP-400 API Fehler
+        -- bei leeren blobs (empty_blob()) wird er aber nicht automatisch gesetzt, daher müssen wir ihn manuell setzen
+        if i_body_blob is not null 
+            and dbms_lob.getlength(i_body_blob) = 0
         then
-            l_content_length := coalesce(dbms_lob.getlength(i_body_blob), 0);
+            l_content_length := 0; -- coalesce(dbms_lob.getlength(i_body_blob), 0);
             apex_web_service.g_request_headers(l_header_index).name  := 'Content-Length';
             apex_web_service.g_request_headers(l_header_index).value := l_content_length;
             l_header_index := l_header_index + 1;
@@ -172,8 +177,8 @@ create or replace package body pck_net_storage as
 
         if i_body_clob is not null
         then
-            apex_debug.info('Clob Request Body used:');
-            apex_debug.info(i_body_clob);
+            --apex_debug.info('Clob Request Body used:');
+            --apex_debug.info(i_body_clob);
             l_response := apex_web_service.make_rest_request(
                  p_url                  => i_url
                 ,p_http_method          => i_method
@@ -182,7 +187,7 @@ create or replace package body pck_net_storage as
                 ,p_wallet_path          => pck_system.f_get_par_wert_by_programmid('NETSTORE_WALLET_PATH')
             );
         else
-            apex_debug.info('BLOB Request Body used! Length: ' || dbms_lob.getlength(i_body_blob));
+            --apex_debug.info('BLOB Request Body used! Length: ' || dbms_lob.getlength(i_body_blob));
             l_response := apex_web_service.make_rest_request(
                  p_url                  => i_url
                 ,p_http_method          => i_method
@@ -545,13 +550,12 @@ create or replace package body pck_net_storage as
             raise_application_error(-20012, 'Object Key darf nicht mit / enden — zum Anlegen von Ordnern p_create_folder verwenden');
         end if;
 
-        -- TEST
-        --l_response := f_make_request(
-        --     i_method       => 'PUT'
-        --    ,i_url          => f_build_url(i_object_key)
-        --    ,i_body_blob    => i_content
-        --    ,i_content_type => i_content_type
-        --);
+        l_response := f_make_request(
+             i_method       => 'PUT'
+            ,i_url          => f_build_url(i_object_key)
+            ,i_body_blob    => i_content
+            ,i_content_type => i_content_type
+        );
 
         l_obj_path := f_split_object_key(i_object_key);
         pck_log.p_info(