Shortcut with Super doesn't work with Service

Hello, I have a Windows 7 as host and use Synergy with CentOS as client. Everything works fine but if I try to install Synergy as service my Windows PC won't recognize any shortcuts with Super. I have a local running script which waits for SUPER+y or SUPER+x. Both combinations are ignored. If I run synergy local they will work. Do you have any suggestions? Thanks in advance Giro