I Dropped my phone a couple of days back and since then there is a text messaging problem on my nokia 7230.

A few messages get sent, say 4 to 5 messages and then the messages sent there after get failed. they get sent only after switching off and switching on the phone again. Incoming messages come as a bulk with 11 12 messages all together. I contacted my service provider and there is no problem apparently, Can anyone please help me?