Java APIs

I m working on development of SMPP Client, using Java. In it�s development I didn�t used any API from eny vendor, and implemented purely in Java. I am facing one unusual problem in receiving of Picture Messages. Also, I have one C based client application.

I m sending picture message through both client application(s) to be delivered over different handset(s). I have tested many different cases, but could not conclude to any solution. The behavioral cases are as follows;
When I sent same picture message through Java SMPP client on Nokia 1100, it get received with prompt �Picture Message Received�. And on viewing it, �Message cannot be displayed�, is informed and no picture message get displayed. Till now it happens for every caseto this handst, but get properly displayed on Nokia 32xx / 53xx.
Whereas while sending through the C SMPP Client on Nokia 1100, sometime it get displayed and sometimes it doesn�t. Same prompts follows on not receiving right picture message while using Java SMPP Client

I m not understanding why;
It doesn�t get delivered correctly a picture message, every time I submits it to deliver on 1100 while sending through C based,
And why It doesn�t get delivered correctly at all while sending through Java SMPP client on 1100 whereas it get delivered correctly over other Nokia model handset.

Kindly, anyone make me solve out the prob���.