I am using PayPal Website Payment Standard with IPN enabled.Before I was setting cmd variable like this\[code\]<input type="hidden" name="cmd" value="http://stackoverflow.com/questions/3725959/_xclick">\[/code\]but then I canged it to \[code\]<input type="hidden" name="cmd" value="http://stackoverflow.com/questions/3725959/_cart">\[/code\]Also I changed some other variables inside my form\[code\]<input type="hidden" name="item_name_1" value="http://stackoverflow.com/questions/3725959/Item1"><input type="hidden" name="amount_1" value="http://stackoverflow.com/questions/3725959/2"><input type="hidden" name="item_name_2" value="http://stackoverflow.com/questions/3725959/Item2"><input type="hidden" name="amount_2" value="http://stackoverflow.com/questions/3725959/2"><input type="hidden" name="quantity_1" value="http://stackoverflow.com/questions/3725959/1"><input type="hidden" name="quantity_2" value="http://stackoverflow.com/questions/3725959/2"><input type="hidden" name="item_number_1" value="http://stackoverflow.com/questions/3725959/121"><input type="hidden" name="item_number_2" value="http://stackoverflow.com/questions/3725959/122">\[/code\]But when the form is Posted to PayPal I am getting this error.
Thanks in Advance...