SRTM data not loading

Hello everyone. I am a first time poster on these forums and I come to you with a problem I cannot seem to resolve. Recently I decided to attempt to create a half real, half fictional route. Logically it seemed like loading terrain into the sim would be the best place to start. I began by following the tutorial from this thread: viewtopic.php?f=7&t=6151&start=90. I get to the last step where you are supposed to load the data into the sim. I use the settings in the tutorial (SRTM, 19x19) and click ok, the sim "pauses" for about 30 seconds like its loading and then the box disappears and nothing was loaded.
I am 99% sure my coordiantes are correct because when I enable the google maps overlay it is spot on in the correct position.
I would appreciate any help as I have been trying to get it to work for a day and a half now.
I am 99% sure my coordiantes are correct because when I enable the google maps overlay it is spot on in the correct position.
I would appreciate any help as I have been trying to get it to work for a day and a half now.