Timeline Crash after import 3 Audio/Video files

[#1]

Hey guys! I have a big problem. 

As soon as I import more then 3 audio or video files, my premiere timeline is working extreme slowly. 

All the other things in permiere are working, exept the timeline. 

Any ideas?!

[#2]

Hey guys! I have a big problem. 

As soon as I import more then 3 audio or video files, my premiere timeline is working extreme slowly. 

All the other things in permiere are working, exept the timeline. 

Any ideas?!