CreateProcessAsUser issue on Windows - winapi

Question

I'm trying to get user token via LogonUser() WinAPI call and execute process via that user on windows by CreateProcessAsUser () call. The problem is that I get 1314 'A required privilege is not held by the client' error. I'm currently logged in via 'Pearl' and as you see I'm using my own credentials there. This used is in Administrators group, I also checked the Local Security Policy and this user has all necessary permissions (Act as part of operating system, Create token object and Log on as batch job. My code is:
#include <windows.h>
#include <stdio.h>
#include <userenv.h>
int enable_priv(HANDLE hToken, const char* name)
{
TOKEN_PRIVILEGES tp;
memset(&tp, 0, sizeof(tp));
if (LookupPrivilegeValue(NULL, name, &tp.Privileges[0].Luid) == 0)
{
fprintf(stderr, "Error: %ld\n", GetLastError());
return 0;
}
tp.PrivilegeCount = 1;
tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if (AdjustTokenPrivileges(hToken, FALSE, &tp, sizeof(TOKEN_PRIVILEGES), NULL, 0) == 0)
{
fprintf(stderr, "Error: %ld.\n", GetLastError());
return 0;
}
return 1;
}
int main(int argc, char **argv)
{
HANDLE hToken1 = NULL;
HANDLE dup = NULL;
STARTUPINFO si = {0};
PROCESS_INFORMATION pi = {0};
si.cb = sizeof(STARTUPINFO);
DWORD flags = CREATE_NO_WINDOW;
fprintf(stderr, "testlog starting...\n");
if (OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES, &hToken1) == 0)
{
fprintf(stderr, "token failed code '%lu'.\n", GetLastError());
return -1;
}
enable_priv(hToken1, SE_TCB_NAME);
enable_priv(hToken1, SE_ASSIGNPRIMARYTOKEN_NAME);
enable_priv(hToken1, SE_INCREASE_QUOTA_NAME);
if (LogonUser("Pearl", NULL, "pass",
LOGON32_LOGON_INTERACTIVE,
LOGON32_PROVIDER_DEFAULT, &hToken1) == 0)
{
fprintf(stderr, " Interactive logon failed.\n");
return 0;
}
if (DuplicateTokenEx(hToken1, MAXIMUM_ALLOWED, NULL, SecurityDelegation,
TokenPrimary, &dup) == 0)
{
fprintf(stderr, "ERROR is '%lu'.\n", GetLastError());
return 0;
}
fprintf(stderr, "testlog executing...\n");
fflush(stderr);
fflush(stdout);
if (CreateProcessAsUser(dup, NULL, "C:\\Program Files (x86)\\folder1\\tazo.exe", NULL, NULL, TRUE,
flags, NULL, NULL, &si, &pi) == 0)
{
fprintf(stderr, "testlog Error is '%lu'\n", GetLastError());
}
}
Can anyone please help?