my bbm is not working properly

hi all the last few hours my bbm has stopped sending messages. i can recieve bbm messages. i get a tick when sending messages but no D or R and they are not recieved. Everything else on my 9900 works fine. Any help will be appreciated thank you.

Sent from my BlackBerry 9900 using Tapatalk

Please have a look here: http://forums.crackberry.com/service...2012-a-774949/
or here: http://forums.crackberry.com/service...oronto-774953/

Thank you