Unable to configure NSM Proxy Agent

When trying to configure an Agent as a Proxy Agent NSM shows no available Agent in the Proxy Agent Configuration.

Add the following lines to file: %ProgramData%\Novell\Storage Manager\Engine\data\agents.dat

<Proxies>
 <Proxy>proxy_server_name</Proxy>
</Proxies>

Replace 'proxy_server_name' with actual server name.

An example agents.dat file (customer information removed):

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<AgentManager>
 <Agents>
  <Agent>
   <GUID>guid_number</GUID>
   <Version>version_number</Version>
   <ServerName>server_name</ServerName>
   <HostAddress>server_ip_address</HostAddress>
   <HTTPPort>0</HTTPPort>
   <HTTPSPort>3011</HTTPSPort>
   <LastHeartbeat>1317295320</LastHeartbeat>
   <Status>0</Status>
   <ServerStatus>0</ServerStatus>
   <OSPlatform>2</OSPlatform>
   <OSVersion>os_version_info</OSVersion>
   <SSL>1</SSL>
   <Authorized>1</Authorized>
   <Legacy>0</Legacy>
   <CEDMCapable>1</CEDMCapable>
   <MaxCopyDirJobs>20</MaxCopyDirJobs>
   <MaxVaultJobs>20</MaxVaultJobs>
   <MaxDeleteDirJobs>60</MaxDeleteDirJobs>
   <Proxies>
    <Proxy>proxy_server_name</Proxy>
   </Proxies>
  </Agent>
 </Agents>
</AgentManager>