CodsMP has multiple prerequisites which are all included by default in this automatic installer pack. Use this if you don't mind running an executable to install CodsMP.
If you want to download only the .asi file needed for CodsMP, you will need to make sure that you have the following:
SA-MP 0.3.DL — CodsMP will work only on this version of SA-MP. You can connect to 0.3.7 with the help of CodsMP once you install it.
gta_sa.exe 1.0 US — this is needed for CodsMP and many other mods to run. 1.0 US is the best version for modding your game. You can download just the .exe needed here.
Silent's Asi Loader — this is the only .asi loader that intentionally works with CodsMP. If CodsMP will not load, then make sure you have it. Reinstall it if you are not sure.
Visual C++ Redistributable Runtimes — this is required for CodsMP to work. If you recently reinstalled your Windows then you will need this. Download the archive and start "install_all.bat".
Only the 2015 Redistributable Runtimes should be needed but some users still had issues, hence we recommend that you just get everything instead.
Make sure you have done the above before trying to use CodsMP. If CodsMP still does not work, you can also try:
CLEO — some users reported that CodsMP started working after installing CLEO.
Some users reported that CodsMP started working after moving codsmp.asi to their "scripts" folder.
msvcp140.dll — some users reported that they needed this file to work. This also typically means that they did not install the Redistributable Runtimes.