Iphone won't vibrate when receiving sms text

[davidh5252]

Hi I have had this problem for a while now and still do not have an answer.
My phone does not vibrate when I receive a text in the silent mode. I have already checked the settings to make sure it is set to vibrate. When in silent mode it still vibrates when I receive a call or an email, just not when I receive a text.
Any help would be great!!!