Organize Pages doesn't work with big files

Hello friends!

I'm excited to have Acrobat among my software - it made some works really easier. I've used Organize Pages tool many times, and it did very good job when I was combining several PDF files into single one.

BUT. When I try to combine two big files (more than 100 pages each), it doesn't perform the operation and opens a window sayng  "Bad parameter". Please help to fix that and be able to create one big file from two others!!

The way I combine files is that I just drag second file and drop it in the first file. It worked with smaller files, but doesn't want to do it for larger.