Two things have to happen for a flip to occur and you can test them during the day. SGP has to be in the window you set for it to require a flip. And, your mount has to be in its window to flip. I'm not familiar with the EQ6 requirements, but they have to match up and it can be frustrating trying to figure it out.
During the day, just setup and try flips. You can use a planetarium software to find stars just prior to the meridian and then tell SGP to do a flip... If it doesn't, your times are wrong.