Can you make Keylogger Undetectable from Virus Protection & send via Email?

I purchased a remotely installed keylogger. (realtime spy) The company hasn't been very helpful. At first when I attached it to an email it was detected, even in a zip. So, they gave me the "no warning" exe in place of the other. You would think they would have done that to begin with. Then I told them my virus protection discovered it so the software might install without being seen but it looks like it might be detected by virus protection. Seems pointless to send the exe, it installs and then a minute/hour or day later the virus protection discovers it. They said they had no guarantees on that. They told me to add exclusions to the virus protection which is not possible. You have to physically get on the pc to do that. I can't. That is why I'm trying to attach it to an email to begin with. I'm trying to send it to my husband's laptop which stays locked and he takes with him. I've been looking around trying to find out how to make the keylogger I have undetectable from virus protection. I don't mind reading and doing research but I've been trying to figure this out for a couple weeks and don't seem to be any closer. If you could give me some advise on what I should do I would really appreciate it! Thanks