FirstMapLegosp7_V1 - first
V1 so dont hate me
Dont worry, no one here is gonna hate you. We're all loving folk!
Anyways, I noticed that your map has "V1" in it. First off, only use lowercase letters, numbers, and underscores in map file names. Don't rename the .bsp file, as it will mess up the internal file structure. Instead, rename the vmf, then compile. Anways, you dont want to use the version string of "v1", as its not what is used commonly. Instead, follow this great tutorial for proper naming conventions:
Separate names with a comma.