diff --git a/lib/client/dom.js b/lib/client/dom.js
index 901dd9e0..76f4ac8a 100644
--- a/lib/client/dom.js
+++ b/lib/client/dom.js
@@ -174,8 +174,10 @@ var CloudCmd, Util, DOM, CloudFunc;
                         if ( Util.isString(p.url) )
                             p.url = decodeURI(p.url);
                         
-                        if ( p.data && !Util.isString(p.data))
-                            lData = Util.stringifyJSON(p.data);
+                        if ( p.data                 &&
+                            !Util.isString(p.data)  &&
+                                !Util.isArrayBuffer(p.data))
+                                    lData = Util.stringifyJSON(p.data);
                         else
                             lData = p.data;
                         
diff --git a/lib/util.js b/lib/util.js
index ac496d4e..a32f7bc5 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -602,6 +602,14 @@ Util = exports || {};
         return pVarible instanceof Array;
     };
     
+    /**
+     * functions check is pVarible is ArrayBuffer
+     * @param pVarible
+     */
+    Util.isArrayBuffer          = function(pVarible) {
+        return pVarible instanceof ArrayBuffer;
+    };
+    
     /**
      * functions check is pVarible is boolean
      * @param pVarible