diff --git a/xvaga/xvaga.cpp b/xvaga/xvaga.cpp
index dcefa08bb..e7ab30152 100755
--- a/xvaga/xvaga.cpp
+++ b/xvaga/xvaga.cpp
@@ -3775,7 +3775,7 @@ long xvt_sys_close_siblings(WINDOW win)
 BOOLEAN xvt_sys_goto_url(const char* url, const char* action)
 {
 #ifdef WIN32
-  if (action != NULL && xvt_str_compare_ignoring_case(action, "open") != 0)  
+  if (action && *action && xvt_str_compare_ignoring_case(action, "open") != 0)  
     return OsWin32_GotoUrl(url, action);
 #endif
   return wxLaunchDefaultBrowser(url);
@@ -3784,14 +3784,7 @@ BOOLEAN xvt_sys_goto_url(const char* url, const char* action)
 BOOLEAN xvt_sys_dongle_server_is_running()
 {
   wxSingleInstanceChecker sic("Authorization");
-  BOOLEAN ok = sic.IsAnotherRunning();
-
-#ifdef WIN32
-  if (!ok) // Testo anche il buon vecchio Frontend!
-    ok = ::GlobalFindAtom("DONGLE_SERVER_ATOM") != 0;
-#endif
-
-  return ok;
+  return sic.IsAnotherRunning();
 }
 
 int xvt_sys_get_profile_string(const char* file, const char* paragraph, const char* name,
@@ -3833,7 +3826,7 @@ long xvt_sys_get_profile_int(const char* file, const char* paragraph, const char
   char defstr[16] = "", str[16] = "";
   long value = defval;
   if (defval != 0)
-    sprintf(defstr, "%ld", defval);
+    wxSprintf(defstr, "%ld", defval);
   if (xvt_sys_get_profile_string(file, paragraph, name, defstr, str, sizeof(str)))
     value = atol(str);
   return value;
diff --git a/xvaga/xvtextra.cpp b/xvaga/xvtextra.cpp
index 88263290a..099acd3bc 100755
--- a/xvaga/xvtextra.cpp
+++ b/xvaga/xvtextra.cpp
@@ -1,5 +1,6 @@
 #include "wxinc.h"
 #include "wx/print.h"
+#include "wx/tokenzr.h"
 
 #include "xvt.h"
 
@@ -1239,7 +1240,7 @@ typedef int (*dllVerifyMethod) (
 
 static dllSignMethod _SignPDF = NULL;
 static dllVerifyMethod _VerifyPDF = NULL;
-static wxString _strPin;
+static wxString _strPin, _strDllFile, _strCertificate;
 
 static BOOLEAN xvt_sign_init(BOOL bLoad)
 {
@@ -1256,10 +1257,24 @@ static BOOLEAN xvt_sign_init(BOOL bLoad)
         _SignPDF   = (dllSignMethod)::GetProcAddress(hESigner, "Sign");
         _VerifyPDF = (dllVerifyMethod)::GetProcAddress(hESigner, "Verify");
         _strPin = "";
+
+        char str[_MAX_PATH] = ""; 
+        xvt_sys_get_profile_string(NULL, NULL, "Study", "", str, sizeof(str));
+        wxString strConfig; strConfig << str << "/config/" << wxGetHostName() << ".ini";
+        xvt_sys_get_profile_string(strConfig, "fd", "Cert_"+wxGetUserId(), "", str, sizeof(str));
+        wxStringTokenizer strDllCert(str, ",");
+        _strDllFile = strDllCert.GetNextToken();
+        _strCertificate = strDllCert.GetNextToken();
       }
     }
     ok = hESigner != NULL && _SignPDF != NULL && _VerifyPDF != NULL;
-    if (!ok)
+    if (ok)
+    {
+      ok = wxFileExists(_strDllFile);
+      if (!ok)
+        xvt_dm_post_error("Can't load certificate or driver");
+    }
+    else
       xvt_dm_post_error("Can't load ESigner.dll");
   }
   else
@@ -1267,6 +1282,7 @@ static BOOLEAN xvt_sign_init(BOOL bLoad)
     if (hESigner != NULL)
     {
       ::FreeLibrary(hESigner);
+      hESigner = NULL;
       _SignPDF = NULL;
       _VerifyPDF = NULL;
       _strPin = "";
@@ -1288,23 +1304,38 @@ BOOLEAN xvt_sign_file(const char* input_name, char* output_name)
   }
   strInput.MakeLower();
 
+  if ((_strPin.IsEmpty() || _strDllFile.IsEmpty()) && !xvt_sign_start())
+    return FALSE;
+
+  const char* ext = strInput.EndsWith(".pdf") ? ".pdf" : "";
+
   wxString strOutput = output_name;
   if (strOutput.IsEmpty())
   {
-    strOutput = strInput + ".p7m";
+    strOutput = strInput.BeforeFirst('.') + ".p7m.pdf";
     if (output_name != NULL)
       wxStrncpy(output_name, strOutput, _MAX_PATH);
   }
 
-  if (_strPin.IsEmpty() && !xvt_sign_start())
-    return FALSE;
-
-  const char* ext = strInput.EndsWith(".pdf") ? ".pdf" : "";
-  int res = _SignPDF("S", "T", // "S"ignature with "T"oken or smartcard
-                     (char*)(const char*)strInput, (char*)(const char*)strOutput, 
-                     NULL, (char*)ext, NULL, NULL, NULL, NULL,
-                     (char*)(const char*)_strPin,
-                     NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
+  int res = 0;
+  if (_strDllFile.EndsWith(".dll"))
+  {
+    res = _SignPDF("S", "T", // "S"ignature with "T"oken or smartcard
+                   (char*)(const char*)strInput, (char*)(const char*)strOutput, 
+                   NULL, (char*)ext, NULL, NULL, NULL, (char*)(const char*)_strDllFile,
+                   (char*)(const char*)_strPin, NULL, (char*)(const char*)_strCertificate,
+                   NULL, NULL, NULL, NULL, NULL, NULL);
+  }
+  else
+  {
+    wxString strFile = strOutput;
+    strFile = strFile.BeforeLast('.');
+    res = _SignPDF("S", "P", // "S"ignature with "P"fx file
+                   (char*)(const char*)strInput, (char*)(const char*)strFile,
+                   NULL, (char*)ext, NULL, NULL, (char*)(const char*)_strDllFile, NULL,
+                   (char*)(const char*)_strPin,  NULL, NULL,
+                   NULL, NULL, NULL, NULL, NULL, NULL);
+  }
 
   if (res == 0)
   {
@@ -1328,11 +1359,16 @@ BOOLEAN xvt_sign_file(const char* input_name, char* output_name)
 BOOLEAN xvt_sign_start()
 {
   BOOLEAN ok = xvt_sign_init(TRUE);
+  
   if (ok)
   {
-    char* pin = _strPin.GetWriteBuf(16); *pin  = '\0';
+  }
+
+  if (ok)
+  {
+    char pin[16] = "";
     xvt_dm_post_string_prompt("PIN", pin, 15);
-    _strPin.UngetWriteBuf();
+    _strPin = pin;
     ok = !_strPin.IsEmpty();
   }
   return ok;
@@ -1360,6 +1396,7 @@ BOOLEAN xvt_sign_test(const char* input_name)
   }
   strInput.MakeLower();
 
-  int res = _VerifyPDF("V", (char*)(const char*)strInput, NULL, NULL, NULL, NULL);
+  char result[_MAX_PATH];
+  int res = _VerifyPDF("V", (char*)(const char*)strInput, NULL, NULL, NULL, result);
   return res == 0;
 }