Command execution whilst claiming kit not working for non-admins

Hi - I've a prestige kit that contains an item to give RP upon claim.

The command is /rp add %username% <value>

This works ... but only if an administrator claims the kit... Checking (server rewards plugin) it's clear that you need Admin perms to execute this this command. 

Is there a way to have the kits plugin execute commands as "admin" authority so that default players can claim this item ? 

Thanks

Hi. I can assume that you are using the chat command, and you need to use the console command (they are run on behalf of the server)