i have a client application which binds to a SMSC Server using SMPP Protocol .I am using Logica SMPP API(based on JAVA) which i downloaded from sourceforgenet. SMPP protocol version is 3.4. It sucessfully connected to 2 simulators(one is deveolped using java and other one is based on CNET) I downloaded from web. However it does not get bound to real SMSC server which is in my customer site. There is error message coming bind request failed" and it throws a null pointer exception. All the input parameters are given coerrectly.