I'm thinking he may be asking if you have the latest version of the LA mod? (not sure). Also. LA Mod version 1.8.1 is just a mission patch. It allows you to play the original Emergency 4/ 911: First Responders missions using the LA vehicles.
No, a clarification:
v1.8 was released earlier this year. I made a patch for it later.
v1.8.1 is a re-release of v1.8 which contains a couple of changes and the latest patch.
The mission patch is something else. Good thing is it will be merged in v1.9, that means the main missionlist will have all 30 missions (20 original + 10 LA Mod).