Commented Unassigned: Creation date [15]

Hi, Im just using the newest version of SPfilezilla but when i upload to SharePoint the creation date is modified to the date im uploading. I see in the specifications of this program that it should reserve the originally date.
Am i doing something wrong?"
Best regards,
perry
Comments: I receive this error when uploading a file 10.51.21: System.Exception: File uploaded but error setting created/modified dates: String was not recognized as a valid DateTime. at BandR.SpComHelper.UploadFileToSharePoint(String spSiteUrl, String spSiteUsername, String spSitePwd, String spSiteDomain, Boolean isSpOnline, String filePath, String spFolderUrl, Boolean overwrite, Nullable`1 dtCreated, Nullable`1 dtModified, Boolean& skipped, String& msg)