Invoking DB2 Stored Procedure using Java PreparedStatement

I am having a problem with Java Client for DB2 stored procedure. I am using PreparedStatement and setting data using setString() function. In some cases when I have large buffer size the data is getting misaligned on the mainframe side due to some binary/invalid chars getting appended before the string.

Following is the Stored Procedure I/O Structure:

Field Name     DATA TYPE     INPUT/OUTPUT     SIZE
_____________________________________________________
HDRCNTL             VARCHAR          INPUT          300
INORDERNO     CHAR          INPUT          9
INGENL          CHAR          INPUT          91
INDATA          VARCHAR          INPUT          29942
COMMAREA     VARCHAR          OUTPUT          400
_____________________________________________________

I am using setString() to set all the input data elements. The data received on mainframe has 2 additional chars in the beginning of INDATA string. I tried using setBytes() also and that doesn't work either. I am looking for solution to avoid the 2 chars getting on mainframe DB2.


Thanks much.