i cant conect to met5 strategy tester as an agent ? help me plizzz

Looks like there is some duplication in your list of agents, which will cause problems.  Right-click each one and uninstall it.  Once they're all uninstalled, close the Agents Manager window, and open it up again.  If some agents have reappeared in the list, reboot your PC and try again.  Once the list is confirmed empty, set the Agents dropdown box to its highest number, and click the [Add] button to reinstall your agents.  They should start on their own upon being added; but if they don't, you can right-click each stopped one and click Start.