Recurrence of inverted red triangles that won't let me record.

I had this problem previously, and I found that I could fix it by making sure the sampling rate was the same in each of the three places, namely, near bottom in the application, under Edit-Preferences, and in my computer under advanced preferences for recording. However, I recently had the same problem and it won’t go away this time. What am I doing wrong?

So it wouldn’t hurt to post a screen shot of your red triangles and all the surrounding stuff, along with a description of what you are trying to record and how, including specific model numbers of USB interfaces, what steps you have taken so far,…