can not see ABAP code of programs and FM using SE37, SE38, SE80

Hi, all!

When I try to open ABAP-code using transactions SE37, SE38, SE80, they don't display it. Instead it current mode hangs, but I can open another one.

System ECC 6.0, SAP_ABA package SAPKA70021, GUI Patch 17.

I have 2 laptops, one of them works with these transaction properly, another gives described problem. Other my colleagues don't have such problems.

Can anybody help me to solve this problem?

BR,

Boris