As the addolution command says , it will simply add the solution to the solution store. You need to call the deploysolution command to get the material. Here is the command you should call
stsadmin -o deploysolution -name [solutionname] -allowgacdeployment
Note that allowgacdeployment is required to host files in gac. you can help this team more with this
STSADM.EXE -help deploysolution
There is an alternative for this, through the user interface. Go to Central Administrator → Operations → Decision Management select a solution and tell deploy. it will be an easier way to do it quickly.
Kusek
source share