wsp package not deployed

Hi ,

I tried to deploy a wsp package on my sharepoint server using powershell , the add solution command works fine but the install command don't work...nothing is done and i don't find my wsp in site feature.

when i try to re-install the package i get this error : 

PS D:\Users\LM> Install-SPSolution -Identity KWSResourceBooking.wsp -WebApplication http://siege-p1208-002/ -GACDeployment
Install-SPSolution : La solution « kwsresourcebooking.wsp » est déjà en cours de déploiement ou d'annulation de déploiement. 

 thanks.