We are using SilkTest 5.5 with Blue Express to test our mainframe application. We are using a 3270 Terminal emulation set to Mod 4. We have been using this for over a year now. Recently on one machine every time we move from one panel to another, Blue changes the display type from Mod 4 to Mod 3. Then when we move again it goes back to Mod 4 and this flip-flop continues. All of the settings on this machine are the same as all of the other machines. Any ideas as to why this might be happening? At this point I'm stumped.

Thanks in advance for your help.