diff --git a/go_cloud/api b/go_cloud/api
index c3327c6..c286078 100755
Binary files a/go_cloud/api and b/go_cloud/api differ
diff --git a/go_cloud/internal/http/wopi_handlers.go b/go_cloud/internal/http/wopi_handlers.go
index 6a61dd2..87dd862 100644
--- a/go_cloud/internal/http/wopi_handlers.go
+++ b/go_cloud/internal/http/wopi_handlers.go
@@ -340,6 +340,7 @@ func wopiGetFileHandler(w http.ResponseWriter, r *http.Request, db *database.DB,
 
 	// Get access token from query parameter
 	accessToken := r.URL.Query().Get("access_token")
+	fmt.Printf("[WOPI-GetFile] Access token from query: '%s'\n", accessToken)
 	if accessToken == "" {
 		errors.WriteError(w, errors.CodeUnauthenticated, "Missing access_token", http.StatusUnauthorized)
 		return
@@ -533,10 +534,11 @@ func wopiPutFileHandler(w http.ResponseWriter, r *http.Request, db *database.DB,
 		return
 	}
 	defer r.Body.Close()
-
+	fmt.Printf("[WOPI-STORAGE] Read content: %d bytes\n", len(content))
 	// Check for suggested target (used for export operations like Save as PDF)
 	suggestedTarget := r.Header.Get("X-WOPI-SuggestedTarget")
 	isExport := suggestedTarget != ""
+	fmt.Printf("[WOPI-PutFile] Suggested target: '%s', isExport: %v\n", suggestedTarget, isExport)
 
 	var targetFile *database.File
 	var targetRemotePath string
@@ -846,8 +848,10 @@ func collaboraProxyHandler(w http.ResponseWriter, r *http.Request, db *database.
 		return
 	}
 
-	// Build WOPISrc URL (without access_token - that goes in a separate form field)
-	wopiSrc := fmt.Sprintf("https://go.b0esche.cloud/wopi/files/%s", fileID)
+	fmt.Printf("[COLLABORA-PROXY] Generated access token: %s\n", accessToken)
+
+	// Build WOPISrc URL (with access_token as query parameter)
+	wopiSrc := fmt.Sprintf("https://go.b0esche.cloud/wopi/files/%s?access_token=%s", fileID, url.QueryEscape(accessToken))
 
 	// Get the correct Collabora editor URL from discovery (includes version hash)
 	editorURL := getCollaboraEditorURL(collaboraURL)