Select delivery documents by creation date

Hello,

I privation to prime deliveries based connected the pursuing criteria via class /scwm/cl_dlv_management_prd and method query:

• DOCCAT: PDO
• ITEMTYPE: ODTS
• Creation Date: Given Range selected by the user 

My codification looks similar this:

Selection table:

No documents are recovered if enactment criteria for instauration day (CRETST_H) is included. If I region this past a papers is recovered (with CRETST successful the fixed range):

What americium I doing wrong?

Best regards,

Tim