BSNL — I can't send sms for port 1900

Address:

Barmer, Rajasthan, 344001

I cant send sms to company to porting. Last 15 days i contact to customer care but there is no any resposce i contact the executive says there is no any problem u send again sms the code ll come.

But i cant send sms to 1900 port my bsnl number is [protected] plz give the proper solution. And asap resolve the my pro dont give the wrong info its very imp no for me i.