I'm no expert on PA, but it seems you're looking at a client running the PA agent.
It seems reasonable that you may still need to schedule a deployment task to upgrade the actual PA agent on the client machine, I doubt this will happen automatically just because you checked in the 5.3 extension and package.
Just a thought, as this is how it works for products managed by ePO in general.
Thanks for the reply I already did I m getting an error repository not found or some thing like Unable to find a valid repository
whats the best place to check the logs for this I dont have that error for the other xtension that I deployed before strangely enoguh so thats I m thinking they are related