Problems with mainframe emulator using EHLLAPI

Question

Hi there,
I am using EHLLAPI to connect to a mainframe emulator.  I can connect to the session and do some major commands (e.g. connect, disconnect, get cursor, set cursor, sendkey, copy ps to string, etc.).  The emulator is Rumba version 5.2.  What I can't get my Windows app to do is to chain a bunch of commands together.  For example: I want to loop where I use Sendkey, then SetCursor, the Sendkey, SetCursor, Copy PS to String, etc.).  I can't get the chain of commands to work, only the first two or so work and then nothing.  Thanks in advance.