Media Object Graphic Size in Report Designer

When I add a dynamic media object into the table cell in RepeatPage, the graphic size always stays at its original size.
Does anyone have an idea?

<table-body>
 <data>/tns:DENER_SATIS_TEKLIF_FORMU_REP_REQUEST/tns:DENER_SATIS_TEKLIF_FORMU_REP/tns:LINES1/tns:LINE/tns:TECHNICAL_MEDIAS1/tns:TECHNICAL_MEDIA</data>
 <table-row>
	<properties>
	   <keep-together>auto</keep-together>
	   <keep-with-next>auto</keep-with-next>
	   <keep-with-previous>auto</keep-with-previous>
	</properties>
	<table-cell>
	   <properties>
		  <hyphenate>true</hyphenate>
		  <number-columns-spanned>1</number-columns-spanned>
		  <text-align>center</text-align>
	   </properties>
	</table-cell>
	<table-cell>
	   <properties>
		  <display-align>center</display-align>
		  <text-align>center</text-align>
	   </properties>
	   <external-graphic>
		  <properties>
			 <_default-logotype>true</_default-logotype>
			 <_explicit-path>true</_explicit-path>
			 <dynamic_image_on_DB>true</dynamic_image_on_DB>
			 <fallback_path>/tns:DENER_SATIS_TEKLIF_FORMU_REP_REQUEST/tns:PROCESSING_INFO/tns:PROCESSING_ATTRIBUTES/tns:DEFAULT_LOGOTYPE</fallback_path>
			 <file_extension>gif</file_extension>
			 <height>1cm</height>
			 <image_bind_variable>tns:ITEM_ID</image_bind_variable>
			 <image_sql_stm>select media_object from media_item_tab where item_id = :1</image_sql_stm>
			 <keep_aspect_ratio>true</keep_aspect_ratio>
			 <left>0cm</left>
			 <runtime_path>/tns:DENER_SATIS_TEKLIF_FORMU_REP_REQUEST/tns:DENER_SATIS_TEKLIF_FORMU_REP_ARCHIVE_VARIABLES/tns:VARIABLE[tns:NAME='rhSysLogo']/tns:VALUE</runtime_path>
			 <runtime_path_DB>vldtimg:getDBImageAndPath($designtime_path,$designmode,'select media_object from media_item_tab where item_id = :1',tns:ITEM_ID,'','','','')</runtime_path_DB>
			 <src>DENER/DENER_SATIS_TEKLIF_FORMU_REP/img.png</src>
			 <top>0pt</top>
			 <width>1cm</width>
		  </properties>
	   </external-graphic>
	</table-cell>
	<table-cell>
	</table-cell>
 </table-row>
</table-body>

Have a nice day!