[CMS] Computer install altiris agent only

Hello everyone,

I'm managing a SMP these days, and deploying altiris agents as well. 

However, when deploying altiris agent to certain computer, some of these end up installing altiris agent only and not all the plug-ins enabled

See image, as example:

When deploying again to these computers, some of them are able to get all the plug-ins and some don't. What's the cause of this?

Thanks in advance