ZPRINTING/Z_PRINT_HELP_SERVICE with Table Interface

Hi,
I use the ZPRINTING help service and the Z_PRINT_HELP_SERVICE help service class as a printing solution.
I have modified the table interface to change the look of the table.
I want this table interface change to be reflected in the print solution.
I added this to the URL "&MODIFY_CLASS=ZCL_TABLE_ENHANCE". ZCL_TABLE_ENCHANCE is the name of my table interface class.
The entire url is:
http://SERVER:PORT/sap/bw/BEx?SAP-LANGUAGE=E&PAGENO=1&REQUEST_NO=1&CMD=PROCESS_HELP_WINDOW&HELP_SERVICE=ZPRINTING&DATA_PROVIDER=DP<b>&MODIFY_CLASS=ZCL_TABLE_ENHANCE</b>&P_STYLESHEET=/sap/bw/Mime/BEx/StyleSheets/BWReports_smallfont_print.css&P_PREVIEW_MODE=&P_HEADER_HEIGHT=1.00&P_HEADER_INDENT_LEFT=0.50&P_HEADER_INDENT_RIGHT=0.50&P_FOOTER_HEIGHT=0.8&P_FOOTER_INDENT_LEFT=0.50&P_FOOTER_INDENT_RIGHT=0.50&P_DATA_AREA_PADDING_TOP=0.00&P_DATA_AREA_INDENT_LEFT=0.50&P_DATA_AREA_INDENT_RIGHT=0.50&P_DATA_AREA_COLUMNS=4&P_PAGE_WIDTH=25.40&P_PAGE_HEIGHT=19.05
However, when I run the printing solution, my table interface changes aren't reflected.
Any help is appreciated.
Thanks.

Audrey,
usually, you don't attach "modify_class" to the URL CMD, rather it needs to be attached to the object tag of the "item".
Once it is attached to the object tag, you just need to attach "help_serivce" class & the "item" to the URL CMD.
I've included a few lines of sample code here. Hope it helps.
<object>
<param name="HELP_SERVICE" value="ZPRINTING"/>
<param name="MODIFY_CLASS" VALUE = "ZCL_TABLE_ENHANCE">
ITEM: TABLE_1
</object>
<A href="JavaScript:window.open(SAP_BW_URL_Get() + '&CMD=PROCESS_HELP_WINDOW&help_service=ZPRINTING&item=TABLE_1');" >

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