swftools ERROR ID Table overflow

 /home/swftools/bin/pdf2swf "1.pdf" -o  "2.pdf.swf" 

ERROR   ID Table overflow

ERROR   This file is too complex to render- SWF only supports 65536 shapes at once

[root@localhost logs]# /home/swftools/bin/pdf2swf "1.pdf" -o  "2.pdf.swf" -s poly2bitmap

NOTICE  File contains Type3 fonts

NOTICE  Writing SWF file /home/dsa/www.dsa.or.kr/bbs/data/dsa_or_kr/ins_bbs6/1.pdf.swf