Error while load paches from front end through SPAM

Hi Experts,

When I am loading the support patches from SPAM , A messege is comming .

"There is no decompression software installed on the application server."

We have 2 application servers and 1 central instance.I tried to do this by login in to each of the application servers, but i'm getting the same error.

Please note that we have SAPCAR in our \usr\sap\<SID>\sys\exe\run directory.

Please help.

Thanks & regards,

Shanahas.K