Why pdf creator value not getting properly using itextsharp.dll ?

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C#

we have crateing pdf file in

BIRT Report Engine

.
but we have get value like as below

"BIRT Report Engine /home/data894/var/vote/glassfish3/glassfish/domains/domain1/applications/frontal/WEB-INF/lib/org.eclipse.birt.runtime_3.7.2.v20120214-1408.jar using iText /home/data894/var/vote/glassfish3/glassfish/domains/domain1/applications/frontal/WEB-INF/lib/org.eclipse.birt.runtime_3.7.2.v20120214-1408.jar."

so please any idea about this we have get proper value for that kind of pdf file

What I have tried:

we have use ItextSharp.dll but not getting proper value for Creator.