CatalinaFly

I recently installed FSUIPC7 on my new computer. It installed great but when I try to run it I get a message steam: 1250410 Application not found. I click ok and the preparing the cabin splash seconds or so and that's it. I've never used Steam so I'm not sure what I'm doing wrong. Any advice would be greatly appreciated.

I have installed fsuipc7 and put the shortcut on my desktop. When I double click to start the program I get a notification that steam://rungameid/1250410 and a box that says ok. I click ok and a window that says preparing the cabin please wait appears for a short time and then goes away. I have MSFS 2020. The shortcut that is on the desktop is MSFS with what looks like a blue 7. Do you know what step I am missing? I can't get pilot2atc to connect. When I had fsuipc4 it worked ok. Brian