I can't delete the files sent by BOTs

[x1pepe]

I can't delete the files sent by BOTs. Part of the code ...

// DELETE FILE if (msg.isFile) { // If msg its a file ... bot.sendMessage("The file will be delete in 2 seg.");
delay (2000); bot.deleteMessage(msg.ID, msg.chatID); bot.deleteMessage(bot.lastBotMsg());

... Thaks.