PDF! and PDF PRINT PREVIEW IS NOT WORKING IN ME23N Transaction

HI All,

I am trying to save one pdf data to my system by entering pdf! command , Unfortunately its not working.
Also i tried to pdf priview .( print preview >goto > PDF preview> ) but its displaying blank page ....Please help me...

is that an Code error or Configuration error.

Please provide your valuable solutions to come out of this problem.

Regards,

Sachy