A few things I can think of (but you probably already have yourself, so apologies if so).
Are you sure that your 105 line within the INI file does not contain a NULL ?
Are the strings that you read or write the data over the network big enough, or are they being terminated by an ascii null ?
Are you reading all of the data from an INI file and then sending that single string out? (If so, I would look at your TX / RX code)
Regards
Chris