Passing Parameters to DB2 Load Utility

Hi,
I'm trying to load a file into DB2 database table using DB2 Load. I'm able to load the file, using the following statement from the unix prompt.

db2 +p -x load from BOM_Sales_20130326.txt of DEL MODIFIED BY COLDEL\| timestampformat=\"YYYY-MM-DD hh:mm:ss\" insert into GEO_SALES.SDM_STL_VFRSK_SALES NONRECOVERABLE

But, when I try to call DB2 Load from a script after parameterising many of the options, it does not seem to work.

For example, I have re-written the statement as follows:

db2 +p -x "load client from $FILE_DIR/$filenm of DEL MODIFIED BY COLDEL\$FILE_DELMTR timestampformat=\"YYYY-MM-DD HH:MM:SS\" insert into $TGT_SCHEMA_NM.$FILE_STG_TBL_TGT NONRECOVERABLE"

All the variable are assigned with correct values prior to calling the statemant. But it seemed to fail due to wrong timestampformat. The error is as follows:

SQL3191N The field in row "F2-1", column "1" which begins with
"2013-03-26|STL|5678|D|3212345"
does not match the user specified DATEFORMAT,
TIMEFORMAT, or TIMESTAMPFORMAT. The row will be rejected.

In fact, my need is to give the value "timestampformat" also as a parameter, as follows:
db2 +p -x "load client from $FILE_DIR/$filenm of DEL MODIFIED BY COLDEL\$FILE_DELMTR timestampformat=$DTTIME_FMT insert into $TGT_SCHEMA_NM.$FILE_STG_TBL_TGT NONRECOVERABLE"

Since it was not working, just for the testing purpose, the variable $DTTIME_FMT was replaced with \"YYYY-MM-DD HH:MM:SS\". As said earlier, that too does not seem to work.

Request your help to fix this and also like to know whether I can parameterise the all these load options as I've tried.

Thanks,
Tom