Aircel — message is not sending from my aircel no. though it has enough balance.

Address:

Kolkata, West Bengal, 7000061

I am sending the text which is port [my no]. But it says not sending touch to try again. What to do? I have tried several times by sending the message on 1900 bt nothing is happening. How can i get the port code? If there is anything that i could do please suggest me that because i am being helpless now. If people are calling me on my aircel no they can get me. But i can't them. Please help me