diff --git a/supwisdom/protocol/webservice.py b/supwisdom/protocol/webservice.py
index 29cd25f..418c671 100644
--- a/supwisdom/protocol/webservice.py
+++ b/supwisdom/protocol/webservice.py
@@ -104,6 +104,8 @@
     def _sign_data(self, key, data):
         import hmac
         import hashlib
+        if isinstance(key, unicode):
+            key = key.encode('utf-8')
         h = hmac.new(key, digestmod=hashlib.sha1)
         h.update(data)
         return (h.hexdigest(), 'HMAC')
@@ -181,11 +183,13 @@
             http_resp = client.fetch(http_request)
         except HTTPError, ex:
             http_resp = ex.response
-        except:
+            print u"Error<{0}>".format(http_resp)
+        except BaseException:
             traceback.print_exc()
             return False
 
         if not http_resp:
+            print u"Response is empty"
             return False
         self.status_code = http_resp.code
         if http_resp.code != 200:
@@ -195,7 +199,8 @@
             try:
                 response.unserialize(http_resp.body)
                 return True
-            except:
+            except BaseException as e:
+                print u"Decode Error<{0}>".format(e)
                 return False
 
     def _pack_body(self, request, timeout):