HEALLLPPP!!!!!! APP WONT ALLOW ME TO SEND SMS?!?!?!?!?!

So i download the app on my phone then go to the web browser and fill in all the required information. I go to SMS and type a message then click send.
Well on my phone there is a red "!" mark inside of a triangle on the browser it says that something should pop up and I have to allow permission for third party apps to send sms......IM so confused i really want to use this app!!!!! Help please.

Well, u are not only one who want use this cool app.....but i didn't find anywhere on the net solution for this problem. It's not only wiht airdroid, it's with all app that u can (i my case can't) send sms from pc. The problem is that airdroid does not ask for 3rd party premission......if u find solution let us know....